Qin Chuan, who graduated from the police academy, and his friends Ye Maosheng and Li Wen returned to their hometown with dreams of heroes and detectives and became ordinary policemen at the police station.The huge gap between reality and ideals did not stop him from pursuing his dreams.By chance, Qin Chuan subdued the gangster who was about to cause an explosion with his bare hands, and thus began his career as a criminal police officer.Under the leadership of his superiors, he gradually matured and solved several major cases that shocked the country.His friend Ye Maosheng died heroically while arresting gangsters, which made Qin Chuan more deeply aware of the responsibilities of criminal police.Under the training, education and encouragement of senior criminal investigators, Qinchuan stood at a higher perspective and actively participated in the practice of police reform and criminal investigation team building. He led the team to successfully solve many long-standing serious cases and established a criminal investigation team.System and three-in-one information platform, he created a modern and professional criminal investigation team, and finally realized his dream of becoming an excellent Chinese criminal police officer.

The story happened on the 28th day of the twelfth lunar month in early 1991. It was the coldest month of winter in Hechang City, Zhongchang Province. The ground was covered with white snow, but this did not weaken the citizens' enthusiasm for welcoming the New Year.Every household has hung up red lanterns, and the market is bustling with people coming and going. People are busy buying new year's goods.

Gao Jianshe, deputy director of the Dashanzi Police Station of the Hechang City Public Security Bureau, hurriedly finished a bowl of noodles at the market, bought a small stool, and hurried home.However, he was attacked from behind halfway and fainted to the ground.The coal miner on the night shift immediately called the police after discovering the incident. Hu Bing, the captain of the criminal police team, quickly led his team members to the scene. Unfortunately, Gao Jianshe had passed away and his gun was missing.

For Qin Chuan, Gao Jianshe was the enlightenment who guided him on the road of criminal police.Qinchuan worked as a policeman at the police station for four years, and later re-entered college with the encouragement of Gao Jianshe.However, just one year after Qinchuan entered school, Gao Jianshe was brutally killed.Qin Chuan made a vow in front of Gao Jianshe's grave that he would return to Hechang City to work as a criminal police officer after graduation.

Four years have passed in a hurry, and the murderer of Gao Jianshe is still at large.After graduating from the Law Department, Qinchuan volunteered to return to Hechang City and was assigned to the Criminal Police Team of Xishan Branch as deputy captain.He immediately came to Gao Jianshe's tomb, and together with Ye Maosheng, a policeman from Dashanzi Police Station, he remembered his old friend and vowed to find the real culprit.

Qin Chuan conducted an in-depth investigation into Gao Jianshe's case file and asked the team leader Hu Bing about the progress of the case.However, Hu Bing told him that the case had been filed and there were no new clues.But Qin Chuan did not give up, and he was determined to restart the investigation.Although Hu Bing was dissatisfied with his approach of killing first and showing off later, he finally gave in.

Qin Chuan returned home and his family was preparing dinner.Ye Maosheng and Li Wen arrived shortly afterwards, and their daughter Ye Haiping was often taken care of by Qin Chuan's family.The two families have a harmonious relationship and are as close as one family.At the dinner table, Qin Chuan confided in Ye Maosheng about his dispute with Hu Bing, and Ye Maosheng advised him not to be too impulsive.

At the same time, Xishan Coal Mine raised millions in cash to prepare wages for workers.However, at this critical moment, three masked robbers broke into the mining compound and fired wildly with guns, killing many people.After receiving the alarm, Qin Chuan and Ye Maosheng rushed to the scene immediately.They discovered that the robbers had fled, but luckily, their wages were saved.

Han Jingdong, director of the Hechang Municipal Public Security Bureau, rushed to the scene. He announced the establishment of a task force, canceled the vacations of all police departments in the city, and devoted all his efforts to solving the case.

Qin Chuan led the team, including Ye Maosheng, Li Baoan and Zhao Yongcheng, and worked continuously day and night, but still failed to find any valuable clues.At this time, Ye Maosheng suddenly mentioned that Bai Ling, who was selling white-striped chicken at the market, had a conspicuous big gold ring on her hand, but Qin Chuan didn't pay attention to it.

Qin Chuan was unwilling and decided to go to the scene again to look for clues.He quickly reported the situation to the task force headquarters, followed closely by Ye Maosheng.Although they were not notified of the case analysis meeting, they still hoped to attend.With Han Jingdong's unusual consent, they were able to observe the meeting.At the meeting, Han Jingdong summarized the investigation and planning of various departments and revealed that this was a carefully planned violent robbery.The suspect is familiar with Xishan Coal Mine and has strong anti-reconnaissance capabilities. He abandoned the car and fled after the robbery attempt.Eleven bodies were left at the crime scene, ten of which have been identified, but the identity of one unknown body has yet to be determined.

Regardless of Ye Maosheng's objections, Qin Chuan insisted on investigating the unnamed corpse, believing that this might be a breakthrough in the case.Dai Changjiang analyzed that the unnamed corpse might have come to the security department officer, while Han Jingdong adopted Qin Chuan's suggestion and shifted the focus of the investigation to the unnamed corpse.Subsequently, Qin Chuan and Ye Maosheng investigated the suspect's escape route and finally came to the mine tunnel of the coal preparation plant.They went separately to the No. 9 family area to learn about the situation. With the help of the aunts in the community, Ye Maosheng discovered a clue about a wig set related to the robber.

After inspection by the technical department, it was confirmed that the wig was left by one of the robbers.Dai Changjiang speculated that the suspect was a local and deliberately wore a wig to confuse the public.At the same time, Qinchuan believed that the Xishan Mine case was related to Gao Jianshe's case, but Hu Bing questioned this.In order to verify Qin Chuan's conjecture, Han Jingdong asked Nie Xingmin to test whether there was Gao Jianshe's gun at the scene.After overnight testing, Nie Xingmin discovered that the pistol used by the suspect was not of high construction quality.

Qin Chuan came to the crime scene again, carefully observed the body of No. 11, and determined that he was one of the suspects and that his body was destroyed by his accomplices.At this moment, five experts sent by the provincial department arrived at the scene, including Cao Zhongshu, a national trace expert, and Wei Ning, a crime-solving expert from the Criminal Investigation Department.They quickly got to work and tested the body of No. 11.Cao Zhongshu discovered bullet marks on the roof at the crime scene and simulated the murder of No. 11.Wu Wei and Wang Delun found two penetrating wounds and special ballistic traces on corpse No. 11.

After careful investigation, Wu Wei and Wang Delun discovered that the two penetrating wounds on corpse No. 11 were from a shotgun and a pistol respectively, which coincided with Cao Zhongshu's previous analysis.Later, Cao Zhongshu led a team of experts, Han Jingdong and others to the scene. They reconstructed the incident: the unnamed corpse No. 11 was first shot in the right cheek by a pistol, and a security officer who survived witnessed his colleague Zhang Yiwen (No. 8)Corpse) was shot in the chest by the robber's shotgun.Cao Zhongshu speculated that Zhang Yiwen tried to fight back with a pistol during his death struggle, but unfortunately he was shot by the robber again.

Regarding the question of whether Zhang Yiwen might have shot his companion, Wei Ning held a negative attitude.However, Cao Zhongshu confirmed that Zhang Yiwen had indeed shot the unknown corpse No. 11 through on-site simulation of bullet marks.Subsequently, the accomplice fired two more shots with a shotgun, one of which was deliberately hit at the muzzle of the pistol with the intention of destroying evidence.This discovery supports Qin Chuan's inference that the unknown corpse No. 11 is actually one of the suspects.Qin Chuan noticed that the suspect had obvious eye features and had dentures. This was probably an injury intentionally caused by his accomplice to conceal his identity.

In order to track down the suspect, Dai Changjiang sent Hu Bing to investigate dental clinics across the city, paying special attention to people with distinctive eyes.At the same time, Qin Chuan was ordered to review relevant files, and Xie Daoxin proposed to mobilize the masses to find the identity of the unknown corpse.Han Jingdong coincided with him and decided to publicly offer a reward of 50,000 yuan in newspapers and media for clues.

In the Qinchuan District archives, Qinchuan discovered clues to the robbery of Jinlu Savings Bank in 1991.In this case, two robbers used high-quality pistols, and one of them had obvious eye features.Qin Chuan believed that there might be a connection between the three cases and suggested a medical case investigation.Despite Hu Bing's objections, Han Jingdong adopted Qin Chuan's analysis, decided to merge the cases for investigation, and issued a reward notice.

At the market, Qin Chuan and Ye Maosheng were busy with investigation work, while Li Wen delivered a box of dumplings.At the same time, Li Baoan and Zhao Yongcheng made no progress in their investigation work at the dental clinic.At this time, He Yutao reported an important clue to Qinchuan: a driver surnamed Luo was robbed by three men and one woman near the Xishan Mine.Qin Chuan immediately went to the No. 9 Police Station to learn about the situation and decided to conduct an investigation in the community.

On the other hand, Cao Zhongshu proposed to clean and dress the unknown corpse No. 11 to restore its true identity.After washing away the blood, they discovered a snake-headed dragon tattoo on the deceased's left arm.This discovery provides new clues for the detection of the case.Prisoners in the detention center identified the unnamed body as Chen Xiaoqiu, and Hu Bing recalled that Du Fengchun had doubts about Chen Xiaoqiu.After a series of investigations, the task force finally determined the identity of Chen Xiaoqiu and listed more than a dozen people with whom he had frequent contact as suspects.

Under the rigorous investigation of the expert team, the whole story gradually became clear.There is a well-planned conspiracy hidden behind the Xishan Mine case. The police have tried their best but still cannot reveal the true identity of the unknown body No. 11.It turned out that Chen Xiaoqiu had long announced that she was going to South Korea to work, and Song Xiaojun took her to the train station alone. During this period, she cut off all contact with her family.In fact, he was secretly preparing for the robbery of wages from the Xishan Coal Mine treasury.

After careful consideration, the expert team decided to arrest Song Xiaojun, Song Xiaomin and Sun Zhe.Cao Zhongshu quickly convened members of the task force to discuss an action plan.Wei Ning suggested taking action at three or four in the morning, while Han Jingdong believed that six-thirty in the morning was more appropriate, because it would be dark by then and the suspect might be in a more relaxed state, and at the same time it would not cause any disturbance to the public.Cao Zhongshu finally adopted Han Jingdong's suggestion.

According to the plan, Han Jingdong assigned Qin Chuan and Ye Maosheng to be responsible for the arrest of Song Xiaojun, Hu Bing was responsible for Sun Zhe, and Xiao Qingdong was responsible for Song Xiaomin.The police officers went to wait near the suspect's residence in the early morning.Just after six o'clock, the three arrest teams quickly attacked. Qin Chuan and Ye Maosheng captured the sleeping Song Xiaojun at Bai Ling's home, while Hu Bing and Xiao Qingdong also successfully captured Sun Zhe and Song Xiaomin respectively.However, no tools of crime were found during a search of their residence.

In the Pre-Trial Section of the Public Security Bureau, section chief Tan Mulin conducted strict interrogations on the three of them.Song Xiaojun responded calmly and insisted that he had nothing to do with the Xishan Mine case. He was at home on the day of the incident and provided alibi evidence and witnesses.He insisted that Chen Xiaoqiu had gone to South Korea and the two had no contact so far.At the same time, he also revealed the relationship between Chen Xiaoqiu's mother Su Xiuyun and Bai Ling, saying that Su Xiuyun regarded Bai Ling as her goddaughter.Xiao Qingdong conducted an in-depth cross-examination of Song Xiaojun, but Song Xiaojun always avoided his relationship with Chen Xiaoqiu and blamed all contacts on his wife Bai Ling.

Although the driver, Lao Luo, was asked to identify the three people, he was unable to do so because they were all masked at the time of the incident.Song Xiaomin claimed that he was playing mahjong with his friends on the day of the incident. After verification, the police confirmed that his statement was true.Sun Zhe, on the other hand, seemed extremely nervous. He claimed that he went out to work in November last year and provided evidence of alibi.After discussing with Wei Ning and Han Jingdong, Cao Zhongshu decided to release Song Xiaomin first and find a breakthrough from Sun Zhe's wife.However, investigators did not obtain valuable information when questioning Sun Zhe's wife. Neighbors confirmed that they saw Sun Zhe carrying a large bag home the day after the incident.The pre-inspector conducted a detailed cross-examination of the three people but found nothing unusual.Wei Ning believed that Song Xiaomin's suspicion could be eliminated and decided to interrogate Sun Zhe and Song Xiaojun again.

Facing Bai Ling who refused to cooperate, Qin Chuan took the initiative to ask Ying for interrogation and sent someone to pick up her child.Qin Chuan used the murder of Gao Jianshe as a breakthrough to persuade Bai Ling not to shield Song Xiaojun.When she heard the child's cry, Bai Ling's psychological defense finally collapsed.She recalled the scene in 1993 when Song Xiaojun took her to stay in a luxury hotel and gave her a big gold ring after he made a lot of money, but now she is more willing to stand up for justice.

In the early spring of 1993, Song Xiaojun took Bai Ling to a luxurious hotel and gave her a dazzling big gold ring.One day, Bai Ling accidentally caught a glimpse of a large bag of cash brought back by Song Xiaojun. When questioned, Song Xiaojun's expression suddenly changed and she claimed that it was the proceeds from stock trading, and Bai Ling was strictly prohibited from asking any more questions.Although Bai Ling had doubts, she could only silently remember the heavy hundred-dollar bill.

Qin Chuan asked Bai Ling to carefully recall Song Xiaojun's whereabouts on the evening of January 28. Bai Ling recalled that Song Xiaojun was in bed early because of stomach pain that night.The next day, she learned from her neighbors that a major incident had occurred in Xishan Mine, but she did not connect the incident with Song Xiaojun.At the same time, Han Jingdong posted a reward notice on TV. Bai Ling felt that the unknown body on TV looked like Chen Xiaoqiu, but Song Xiaojun insisted that Chen Xiaoqiu was in South Korea and warned Bai Ling not to mention it again.

Bai Ling recalled the scene of Sun Zhe's visit on the eighth day of the first lunar month. The two of them hid in the house and talked secretly, and the sound of the TV was deafening.After Sun Zhe left, Song Xiaojun lay alone on the bed and felt sad.Bai Ling informed Qin Chuan of these details one by one, Qin Chuan reported the confession, and Wei Ning sent people to investigate the robberies before March 1993.

Bai Ling was busy selling white-striped chicken at the market every day, and her life was relatively comfortable. She even had the idea of ​​selling roast chicken in the next store.However, she never expected that Song Xiaojun would embark on a criminal path.As an alumnus of Bai Ling, Qin Chuan felt unbearable when he saw the frostbite on her hands.

Although Song Xiaojun denied everything, the testimony of Chen Haishan and Bai Ling was enough for the task force to convict.Wei Ning also learned from Chen Haishan that Chen Xiaodong had a habit of dressing up as a woman. He went home the night of the incident and went to the provincial capital with his mother the next day.Wei Ning concluded that the robber disguised as a woman was Chen Xiaodong and asked the provincial department to assist in the arrest.

Xiao Qingdong consulted relevant files and found that a robbery case that occurred in the Lunan Mining Area on February 4, 1992 completely matched the physical characteristics of the robbers in the Xishan Mining Case, which further confirmed Bai Ling's clues.

Cao Zhongshu issued an order requiring Song Xiaojun and Sun Zhe to confess their crimes before 6:30 in the morning.Qin Chuan was responsible for interrogating Song Xiaojun, while Dai Changjiang was responsible for interrogating Sun Zhe.After many rounds of interrogations, Sun Zhe finally broke down and confessed the facts of the crime after Dai Changjiang presented Bai Ling's confession.

Song Xiaojun remained stubborn and tried to escape the law by persisting for another six hours.Qin Chuan, on the other hand, has been working continuously for more than 20 hours and still sticks to his post, preparing to fight Song Xiaojun to the end.Sun Zhe confessed that the Xishan Mine case was planned by Song Xiaojun. The four of them robbed the wages of the Lunan Mine and brutally killed the driver.

Dai Changjiang found the driver's body and the hidden guns and ammunition based on Sun Zhe's instructions.Qin Chuan interrogated Song Xiaojun again and showed photos of the seized guns and ammunition.Seeing that the situation was over, Song Xiaojun finally began to relent.Qin Chuan felt sorry for Bai Ling that she had married such a cunning and cunning person.

Song Xiaojun confessed that because he was unwilling to live a hard life, he roped in Chen Xiaoqiu as his helper, and brutally killed Gao Jianshe to seize the gun.They successively robbed the Jinlu Savings Bank and the Lunan Mine, but failed.In the end, they targeted the Xishan Coal Mine and hid Sun Zhe and Chen Xiaoqiu in advance to evade pursuit.

Song Xiaojun has evil intentions and attempts to seize the millions of wages from Xishan Coal Mine.To this end, he carefully planned and used Chen Xiaoqiu and Sun Zhe's coal mine work experience as a cover.He rented a residence, arranged for the two of them to hide there, and asked them to conceal the truth from their families, fabricating the lie that Sun Zhe went out to do business and Chen Xiaoqiu went to South Korea to work.In order to ensure that the plan was foolproof, he also specifically told them not to go out during the day to avoid exposing their whereabouts.

In order to allow Chen Xiaoqiu and Sun Zhe to better cooperate in their actions, Song Xiaojun asked them to strengthen physical training and learn shooting and driving skills.At the same time, he also roped in Chen Xiaodong, who is good at assembling guns, to join the plan.After everything was ready, Song Xiaojun finally ushered in the day when Xishan Coal Mine paid wages.

Through Sun Zhe's inquiries, they learned that wages were deposited in the security department's vault.So Song Xiaojun decided to take action on the night of January 28.He made a detailed plan, sneaked into the security department and quickly eliminated the officers in the conference room.However, at this moment, a father and son unexpectedly broke in, and Sun Zhe had to deal with them together.Afterwards, the four men split up and prepared to blow up the warehouse and snatch cash.However, the security officer in the warehouse duty room resisted tenaciously, causing Chen Xiaoqiu to be injured.Seeing this, Song Xiaojun had to order a retreat and asked Chen Xiaodong to shoot Chen Xiaoqiu in the eye to eliminate the hidden danger.Before evacuating, he also set fire to the scene in an attempt to destroy evidence.

Afterwards, Song Xiaojun asked the three of them to return to the rental house and then go home.However, Chen Xiaodong felt guilty for killing his brother with his own hands, and went to the provincial capital to seek refuge with his mother.Qin Chuan was furious at Song Xiaojun's cruel behavior and accused him of dehumanizing him for money.But Song Xiaojun didn't care, insisting that he just wanted his wife to live a good life, and that the failure of the operation was just bad luck.

Finally, Qin Chuan and Hu Bing found Chen Xiaodong based on Song Xiaojun's confession.Chen Xiaodong, who was hiding around after the incident, was frightened to death after seeing the news that the Xishan Mine case was solved, and was eventually captured and brought to justice.He admitted the fact that he shot Chen Xiaoqiu in the eye, but his attitude was cold and there was no brotherhood at all.Qin Chuan was deeply saddened by this.

Song Xiaojun, Sun Zhe and Chen Xiaodong were eventually punished by law.People spontaneously took to the streets to pay homage to the dead police officers.Qin Chuan successfully closed the murder case of Gao Jianshe, and the big stone in his heart finally fell.Director Xu of the Provincial Public Security Department spoke highly of the work of the task force and sent Zhao Fei, an investigation section officer of the Criminal Investigation Corps, to visit the members of the task force.

In the subsequent handling of the case, Qin Chuan was awarded second-class personal merit for his outstanding performance.However, the conflict between him and Hu Bing deepened day by day.In the end, Qin Chuan reluctantly accepted the position of chief of the pre-trial section of the Municipal Bureau under Dai Changjiang's persuasion.

Qin Chuan originally had a dream to show his talents in the criminal police team, but Han Jingdong transferred him to the pre-trial department.This made him full of confusion and uneasiness, so he went to Ye Maosheng to talk to him overnight.Ye Maosheng was reviewing for the exam, and Zhao Fei suddenly called Qin Chuan for help. He and Wei Ning were arresting the suspect at the southern suburbs airport.Although Qin Chuan wanted Ye Maosheng to go with him, considering his studies, he still let him stay at home while he and Xiao Qingdong rushed to the provincial capital overnight.

However, Ye Maosheng did not follow Qin Chuan's advice.When he went downstairs to relax, he accidentally witnessed the car thieves and rushed forward without hesitation.The car thief resisted desperately and the two struggled with each other.In desperation, the car thief fired three shots and then drove away.Ye Maosheng was seriously injured, but he still struggled to chase for a few steps, and finally fell in a pool of blood.

After Wei Ning learned about this, he quickly woke up Qin Chuan.Qin Chuan and Xiao Qingdong rushed back to Hechang anxiously, only to see Ye Maosheng succumbed to his injuries.Qin Chuan was devastated, as if he had lost his own brother.

The police quickly launched an investigation, found witnesses, and discovered the suspect's abandoned vehicle in the No. 7 family area.Qin Chuan rushed to the scene immediately and learned that the suspect's name was Niu Yuguo, a prisoner released from a labor camp.Qin Chuan, Hu Bing and others quickly launched an arrest operation, but Niu Yuguo took the opportunity to escape.Qin Chuan chased after him and finally forced Niu Yuguo to surrender in a snowy field.However, when Qin Chuan thought of Ye Maosheng who died tragically, he couldn't help but raise his gun.Fortunately, Hu Bing arrived in time to stop him.

Qin Chuan and Xiao Qingdong came to Ye Maosheng's grave to mourn. Recalling the time they spent with Ye Maosheng, Qin Chuan couldn't help crying.He came to Ye Maosheng's home and saw Ye Maosheng's suicide note to Li Wen, and felt even more sad.After Ye Haiping learned the news of his father's death, he cried sadly.

Qin Chuan came to the pre-trial department to report, only to find that the place was in chaos.Section Chief Tan Mulin handed him the backlog of files, hoping that he could lead the pre-trial department to normalcy.However, the murder of Ye Maosheng encountered many difficulties.The procuratorate returned the case because Ye Maosheng did not perform an autopsy, which made Qin Chuan furious.He ran around asking for help and finally submitted conclusive evidence to the court and successfully sentenced Niu Yuguo to death.

Li Wen was transferred to work in the Legal Affairs Department of Xucheng City Bureau, and she was undecided whether to go.Qin Chuan and He Qinglian encouraged her to look forward and agreed to help take care of Ye Haiping.Li Wen finally decided to leave the Qinchuan family to work in Xucheng. Ye Haiping was very sad when he learned about it.Qin Chuan comforted her and promised to let Li Wen come back to see her at any time.

Qin Chuan began to deal with the backlog of cases in the pre-trial department. He called a meeting with all staff and assigned cases to everyone.He personally went to the procuratorate to understand the situation, but was treated coldly by prosecutor Chai Yunping.

Qin Chuan took over as the new chief of the pre-trial department. Faced with the difficulties of the department, he was determined to show off his talents and completely change the current situation of the pre-trial department.In the department, young police officers are reluctant to come, leaving only the old, weak, sick and disabled, and the backlog of cases is piling up.Qin Chuan quickly sorted out twelve cases and assigned them to everyone, while he took on the heavy burden of Guo Fengying's fraud case.

He went to the procuratorate and found Chai Yunping, the prosecutor in charge of the case. However, Chai Yunping had a cold attitude, emphasizing that the case had been dismissed due to insufficient evidence, and asked Qin Chuan to recover the 30,000 yuan donated by Guo Fengying to the town government first.Qin Chuan was unwilling to give up and went to the Criminal Police Team to find the police officer who handled the case. He learned that Hu Bing was in charge of the case, but Hu Bing had been transferred.Qin Chuan learned from Tan Mulin that the key notes were in the hands of Guo Fengying's younger brother Guo Qiang, and Guo Qiang had been missing for four years.

The pre-trial department had no authority to investigate the case, so Qin Chuan had no choice but to find Hu Bing, but was met with a cold reception.Qin Chuan was so angry that he decided to go to the town government in person to get the donation back and restart the case.He applied for support from relevant departments, and most of them were very cooperative, but Hu Bing refused.Qin Chuan had no choice but to ask Han Jingdong for help. Han Jingdong taught Hu Bing a lesson, and Hu Bing sent two novices to help.

Qin Chuan also approached Sun Mian, the chief prosecutor of the Procuratorate, and asked the court and the Procuratorate to jointly collect evidence.Sun Mian sent Chai Yunping to cooperate, and Qin Chuan also applied for a car to go to Guo Fengying's hometown to collect evidence.At the town government, Qin Chuan cleverly tricked the mayor into handing over 30,000 yuan.Then, a group of them went to Guo Fengying's hometown. Qin Chuan, with his wit and courage, caught Guo Qiang on the spot, who had been absconding for four years, and obtained the key documents.

Two years later, Qin Chuan was transferred to the deputy director of Dongshan Branch and partnered with Hu Bing.Although Qin Chuan was reluctant, he accepted the appointment under Han Jingdong's persuasion.As soon as he took office, he received a call for help from Chang Baolin, deputy secretary of the municipal party committee. A group of thieves dug a tunnel and stole the soybeans from the granary. Qinchuan was ordered to investigate the case thoroughly.

Qin Chuan and Chai Yunping asked Xiao Qingdong about the soybean theft case together, and learned that the group of thieves headed by Li Ambush were professional in their techniques. They were not only proficient in tunnel digging technology, but also had complete transportation and sales channels.Qin Chuan then came to the detention center and talked with Wang Wu, the person involved in the case, and found that Wang Wu knew nothing about stealing food. He was only responsible for laundering the stolen soybeans on the black market, that is, "washing beans“".Wang Wu also revealed that Li ambushed specifically to pick soybeans to attack.

Qin Chuan learned from Xiao Qingdong that Li Ambushing's true identity might be Li Guoying.So, Qin Chuan took Chai Yunping and Xiao Qingdong to Li Guoying's house.Li's wife lied that Li Guoying was away on business and was not at home.Qin Chuan cleverly found an excuse to enter the house and found that the groups of numbers recorded on the calendar were actually Rencheng's phone numbers.They immediately went to Inseong and found out through the police that the number belonged to Suncheonbok Hotel, which happened to be located near the grain depot.

After Qin Chuan and others left, Li's wife immediately informed Li Guoying.Qin Chuan, Xiao Qingdong and Chai Yunping came to Shuntianfu Hotel and found a man fast asleep at the front desk while the proprietress was busy.Qin Chuan deliberately got close to the proprietress and learned that this restaurant was her new business.After the meal, when Qin Chuan went to the front desk to check out, he found that the man never raised his head, and the landlady ignored him.Qin Chuan became suspicious and decided to go find the landlord to find out the situation.

The landlord revealed that Shuntianfu Hotel had just been transferred out three or four months ago. The landlady’s name was Jin Lizhu, her husband’s name was Zhang Chao, and there was no one named Li Guoying.The hotel closes at six or seven o'clock, and the TV is turned on very loudly after closing time.The landlord took Qin Chuan and others outside the hotel, and they clearly heard the ”tunnel battle% being played on the TV.Qin Chuan suspected that the sound of the TV was to deceive others, so he and Xiao Qingdong secretly climbed onto the roof and asked Chai Yunping to pull the switch.Qin Chuan saw eleven people carrying soil out of the house, all loaded into the small truck that delivered food during the day, and Zhang Chao, who was fast asleep at the front desk, was among them.Qin Chuan immediately understood that this was a group of thieves who dug tunnels to steal food.

After Chai Yunping pulled the switch, people in the yard panicked.The tunnel diggers came up and reported that there was a coffin underground.Jin Lizhu was so frightened that she thought she would be retaliated for bumping into the deceased.Li Guoying reminded everyone not to panic. They were about to dig into the grain depot. There were more than 6,000 kilograms of soybeans there, and they could make a lot of money by changing hands.Zhang Chao asked Jin Yuzhu to prepare some paper money to worship.

The landlord hurried over and lied that the circuit breaker had tripped and promised to fix it immediately.Jin Lizhu believed it to be true and completely relaxed her vigilance.Qin Chuan took the opportunity to call the Rencheng Criminal Police Team for help.Captain Geng Ye quickly arrived at the landlord's house, and he went back to find people for reinforcements.Li Guoying and others burned incense and knelt down to atone for the sins of the deceased in the coffin.

Geng Ye quickly called in the police, and Qin Chuan formulated a careful arrest plan.He and Chai Yunping climbed to the roof and saw Li Guoying and others kowtow to apologize.Qin Chuan quietly came down from the roof and opened the door. Geng Ye and Xiao Qingdong led the police officers into the compound and captured Li Guoying and others.Qin Chuan and Xiao Qingdong came to the tunnel entrance and found that the tunnel had almost reached the grain depot.

During the interrogation, Li Guoying claimed to be smart. He was responsible for planning the entire theft operation, and all team members had received professional training.Jin Lizhu and Zhang Chao opened the restaurant to cover their theft.Li Guoying has repeatedly succeeded in stealing soybeans through tunnels, but he didn't expect to stumble this time.Both he and Park Jianshe confessed that they had stolen a total of 200 tons of soybeans, not 500 tons.

Geng Ye invited Qin Chuan, Xiao Qingdong and Chai Yunping to drink to celebrate.However, Han Jingdong suddenly called Qin Chuan. He saw on TV that the Rencheng Public Security Bureau was taking credit and exposed the investigation process of the case on the news.Han Jingdong was very angry and ordered Qin Chuan to escort the prisoners back to Hechang as soon as possible.

The criminals in the soybean theft case were arrested. Geng Ye quickly made the news public and hosted a banquet to invite Qin Chuan and Chai Yunping to celebrate the victory.However, Han Jingdong expressed dissatisfaction with the matter. He called Qinchuan and demanded that the criminal Li Guoying and others must be brought back to Hechang for trial.

At the banquet, Geng Ye kept toasting to Qin Chuan. After Qin Chuan drank many drinks, Geng Ye agreed to hand over Li Guoying and others.However, Qinchuan suffered from unbearable stomach pain due to excessive drinking, so Chai Yunping rushed him to the hospital.Han Jingdong rushed over after hearing the news and revealed to Qin Chuan the tragic experience of Hu Bing who encountered a car accident while chasing a wanted criminal and had to have his leg amputated.

After Qin Chuan recovered, he immediately went to visit Hu Bing. Seeing his friend's current situation, he was heartbroken. He tearfully apologized to Hu Bing and regretted the past disputes.Hu Bing comforted Qin Chuan with an open-minded attitude, saying that from the day he became a criminal police officer, he had put life and death aside.

When Qin Chuan came home from get off work, he ran into Li Wen coming to pick up his daughter Ye Haiping.Ye Haiping was used to living in Qinchuan's house and was unwilling to leave with Li Wen.Qin Chuan revealed to Li Wen the news that the lawyer of Niu Yuguo, the murderer of Ye Maosheng, was appealing to the Supreme Court. Li Wen was furious after hearing this.Seeing this, Ye Haiping decided to return to Xucheng with Li Wen.

Subsequently, Wei Ning was transferred to the position of director of the Xucheng City Public Security Bureau and invited Wu Yingde, the chief criminal investigation expert, to give a speech.As an audience member, Qin Chuan arrived early.Wu Yingde took the Songlin family massacre case as an example to explain the importance of the direction of criminal investigation work.During the speech, Qin Chuan actively spoke and put forward his own opinions.Although Han Jingdong hinted that he should shut up, Qin Chuan still wanted to express his thoughts.

After the speech, Han Jingdong blamed Qin Chuan for being too showy in front of Wu Yingde and asked him to apologize to Wu Yingde.Qin Chuan prepared gifts and went to Wu Yingde's residence and sincerely expressed his apology.Wu Yingde didn't mind, but returned the gift money to Qin Chuan.

Late at night, Wu Yingde ran into Qin Chuan, who was still studying the Songlin family murder case.The two jointly analyzed the case and finally confirmed Qin Chuan's inference.Wu Yingde was impressed by Qin Chuan's talent and decided to accept him as his apprentice.Qin Chuan wanted this very much and happily accepted it.

After Cao Zhongshu learned of the incident, he congratulated Qin Chuan.However, Qin Chuan is still worried about Ye Maosheng's case.He asked Wu Yingde for help, but Wu Yingde persuaded him to accept the verdict, believing that it reflected the progress of the legal system.Subsequently, Qin Chuan was transferred to the position of captain of the Criminal Investigation Detachment of Xucheng City Public Security Bureau.Before leaving his post, he took Li Wen, Ye Haiping and Li Qinglian to the cemetery to express condolences to Ye Maosheng and say goodbye to Hu Bing.

Qin Chuan was about to report to the Xucheng Criminal Investigation Detachment, and he came specially to say goodbye to Hu Bing.Hu Bing patted him on the shoulder and told him to do a good job.The two played with snowballs, as if they had returned to their carefree childhood.Qin Chuan and Xiao Qingdong will both go to Xucheng. They live in the same compound as Cao Zhongshu, and Qin Chuan's new neighbor is Li Wen.On the day of moving, both Li Wen and Xiao Qingdong came to help. Ye Haiping was even more excited because she could play with He Qinglian's children every day.

At this moment, Dong Zhenfa, director of the Dongping County Public Security Bureau, came here and asked Qin Chuan to help solve an unsolved case five years ago.Ding Li's mother and daughter were killed. The police suspected Gao Peng was responsible, but there was no conclusive evidence.The families of both parties went to the public security bureau every day to cause trouble. Dong Zhenfa had no choice but to come to Qin Chuan for help.Qin Chuan immediately went to Dongping County with Xiao Qingdong without saying a word.

Dong Zhenfa took them to Ding Li's house and described the progress of the case in detail.Qin Chuan carefully analyzed all the evidence and concluded that this was a murder of passion.However, Captain Zhou Yong reminded him to be careful in characterizing the case, because many experts had been invited to the case, but they were unable to make a correct judgment.Qin Chuan did not give up. He insisted on his inference and discovered a bloody fingerprint collected by the police.Unfortunately, this fingerprint has never been identified.

Qin Chuan was very dissatisfied with this and took all the evidence and files back to Xucheng.He originally wanted to ask Cao Zhongshu for help, but Wei Ning advised him not to meddle in his own business.Qin Chuan was unwilling to give in, and decided to continue investigating the case.With the help of Cao Zhongshu, they finally used the image analysis system to find the distinctive features of blood fingerprints, ruling out Gao Peng's suspicion.

Next, Qin Chuan and Xiao Qingdong began to investigate separately.They discovered that Ding Li and Zu Yang were closely related, so they immediately extracted Zu Yang's fingerprints.After comparison, Zu Yang was the most suspicious.In order to be sure, Qin Chuan personally went to Zu Yang to collect fingerprints and left his DNA sample.In the end, they successfully identified Zu Yang as the real culprit.

However, Qin Chuan was not satisfied.He felt that fingerprints and DNA alone were not enough to convict, so he asked Zhou Yong to find Zu Yang's wife to identify the bloody T-shirt at the scene.Zu Yang’s wife confirmed that the dress belonged to Zu Yang.At this point, Qin Chuan finally breathed a sigh of relief, knowing that this unsolved case would finally be solved.

At the scene of Ding Li's murder, the police officers found a key piece of evidence - a blood-stained T-shirt that belonged to the suspect Zu Yang.However, the investigation of the case reached a deadlock because Zu Yang's DNA could not be detected on the T-shirt.At this time, Qin Chuan showed his wisdom. He asked Zu Yang to put on a new T-shirt, and cleverly used Zu Yang's habit of taking off his clothes to allow the technicians to successfully collect blood from the bloody T-shirt.On to the DNA.

After appraisal by the provincial department, the bloody T-shirt was confirmed to belong to Zu Yang. Together with other evidence, such as witness statements and bloody fingerprints, Zu Yang's murder was finally confirmed.Dong Zhenfa and Zhou Yong deeply admired Qin Chuan's rigor and seriousness, and Zhou Yong even offered to transfer from the criminal police team.Under Qin Chuan's command, Zu Yang confessed all his crimes. It turned out that he brutally killed Ding Li and her daughter because he was jealous of Ding Li's new boyfriend.

Time flies by like a flash, and several years have passed in the blink of an eye.Qin Chuan still maintained his enthusiasm for work and solved one case after another.However, just as he had just finished a case that lasted more than thirty hours and was about to go home to rest, he received a new task - a murder occurred in Songshan County.Regardless of exhaustion, Qin Chuan and Xiao Qingdong rushed to Songshan County in heavy snow.

This case occurred five years ago. A fourteen-year-old girl, Li Ai, was raped and murdered on her way to a classmate's home.After the incident, Li Ai's body was brutally thrown into a snow pit.Although the Songshan County Public Security Bureau conducted extensive investigation work, it has been unable to find the real culprit.The former police chief and four police officers were punished for this, and the new deputy chief was also killed in a car accident while investigating the case.This case brought huge psychological pressure to the public security officers of Songshan County.

After Qin Chuan arrived, he immediately devoted himself to the investigation of the case.He studied the files carefully and went to the crime scene to investigate in person.Through a series of reasoning and investigation work, Qin Chuan gradually narrowed down the scope of suspects.Finally, with the help of forensic doctors, Qin Chuan successfully identified the suspect - Ma Chaohua's son Ma Weiming.

After further testing and comparison, forensic doctors confirmed that Ma Weiming was the real murderer of Li Ai.When Gao Zheng and the police arrested Ma Weiming, they cheered loudly with excitement.The case that had troubled them for five years was finally solved.And Qin Chuan once again realized the hardship and responsibility of criminal police work, and he further strengthened his belief - to contribute his own strength to the people's livelihood and peace and prosperity.

Li Wen and Ye Haiping had a dispute over the college entrance examination application. Li Wen beat Ye Haiping in anger, causing Ye Haiping to run away from home.Qin Chuan found Ye Haiping in time and had an in-depth conversation with her.Ye Haiping confided her grievances and determination to Qin Chuan. She insisted on becoming a criminal police officer to avenge her father Ye Maosheng.Qin Chuan understood her feelings, but also reminded her that after graduating from medical school, she could also engage in justice-related jobs, such as forensic medicine.With Qin Chuan's patient persuasion, Ye Haiping finally agreed to go to medical school.

On the other side, Qin Chuan stopped by Wu Yingde on his way to the provincial capital.From Wu Yingde's mouth, Qinchuan learned about two vicious robberies that had recently occurred in Yuncheng.Not only were these two cases vicious, but they also left no valuable clues at the scene.Qin Chuan, Wu Yingde and others conducted an in-depth analysis of the case and believed that the suspect might commit another crime.Soon, another shooting incident occurred in the military center of Yuncheng. A sentry was killed and his gun was robbed.

After receiving the notice, Qin Chuan and others quickly rushed to Yuncheng to assist in the investigation.However, they encountered the indifferent attitude of Deputy Director Yang Ming at the Yuncheng Branch.Qin Chuan and others decided to go to the scene to investigate in person, hoping to find a breakthrough in the case.During the investigation, Qin Chuan learned from the convenience store owner that the suspect might be from a nearby old neighborhood.At the same time, Wu Yingde and others also discovered that this case had striking similarities with the two previous robberies.

Despite the great efforts of Cao Zhongshu, Wu Yingde and others, there has been no progress in the case.Qin Chuan had to return to Xucheng due to work needs, but he was always worried about the Yuncheng case.

After Zhang Kehan ​​committed two bank robberies in Yuncheng, he took away the guns of the army sentries.The expert team of the provincial department decided to investigate the case together and launched a comprehensive search in Yuncheng.Zhang Kehan ​​was afraid of being arrested, so he fled to Xicheng.After careful planning, he decided to attack the depositors of Nongbao Bank again, and planned a convenient escape route in advance, leading directly to the country park.He carefully marked the route on the map.Unfortunately, farmer Li Weiguo accidentally entered the country park at this time, and Zhang Kehan ​​shot him eight times without hesitation, killing him.

A photography enthusiast heard gunshots and witnessed the tragedy while filming in the park, and immediately called the police.The Criminal Investigation Detachment of Xicheng City Bureau quickly rushed to the scene, but Zhang Kehan ​​took advantage of the chaos to escape.The next day, Wu Yingde, Zhao Fei, Cao Zhongshu and others arrived at the scene of the crime, and Xicheng police introduced the case to them.Through cartridge case analysis, Cao Zhongshu discovered that the same M20 pistol was used in this case and the robbery in Yuncheng.He suggested that the four cases be merged for investigation, but Gu Baoxiong, deputy director of the Xicheng City Public Security Bureau, objected, believing that the cases were of different nature and the shooting case should be solved first.After some debate, Gu Baoxiong insisted on his opinion, and they had to leave temporarily.

However, Zhang Kehan ​​did not restrain himself. He once again robbed and killed a depositor at Nongbao Bank.Wu Yingde and others came to Xicheng again and found through surveillance video that the suspect disguised himself as three people and committed the crime.They concluded that this case was committed by the same person as the shooting in the country park.In the face of irrefutable evidence, Gu Baoxiong finally agreed to merge the case for investigation and collect clues.Zhao Fei quickly obtained the suspect's portrait and found that it was consistent with the murderer in Yuncheng.

At this time, Wu Yingde fell due to illness, and Zhao Fei invited Qin Chuan for help.Qinchuan was moved by Wu Yingde's persistence and decided to take on Xicheng's case.He recalled the tragic cases in the past and strengthened his determination to investigate the case.Qin Chuan's decision received support and encouragement from his colleagues.

Qin Chuan was transferred to the Provincial Criminal Investigation Corps and shouldered the heavy responsibility of the Yuncheng and Xicheng shooting cases.Xiao Qingdong and Qin Chuan said goodbye reluctantly. Qin Chuan knew that this trip was a heavy responsibility, and he had already ignored personal gains and losses, just to live up to Wu Yingde's high expectations and not to disappoint his sacrificed comrades and friends.He embarked on a road of no return full of challenges. Wei Ning, Xiao Qingdong and the police officers all applauded Qinchuan.

After arriving at the Criminal Investigation Corps, Zhao Fei enthusiastically introduced Qin Chuan's heroic deeds to the police officers.Li Wen carefully decorated Qin Chuan's office and added green plants and waist pads.Qin Chuan learned from his wife He Qinglian that Zhao Fei and Li Wen were dating, and urged them to get married as soon as possible. Li Wen was ashamed after hearing this.

Zhao Fei obtained a clue about veteran Hu Zhongxing from the Yuncheng police.Hu Zhongxing ran away from home for many years due to emotional problems and once threatened to do something big.He was suspected of purchasing guns from Lanjiang for robbery. Xicheng police applied for a Class A wanted order, but Qin Chuan suggested changing it to Class B.He quickly rushed to Xicheng and studied the materials provided by the Yuncheng police day and night.

Qin Chuan personally visited the crime scene to conduct an investigation, simulated the suspect's robbery process, and followed his escape route.He came to the 905 bus station sign and asked Deng Guangrong, an investigator from the Xicheng Criminal Investigation Team, to retrieve the surveillance video of the bus line.However, Gu Baoxiong expressed dissatisfaction with Qin Chuan's approach and believed that he should not go to the scene first, but should trust the Xicheng police.Qin Chuan didn't care. He reminded Gu Baoxiong to find the whereabouts of Hu Zhongxing as soon as possible, but Gu Baoxiong refused.Qinchuan decided to go to Lanjiang to investigate in person, and at the same time asked the Xicheng police to continue investigating and collecting evidence based on three blurry videos.

Although Cao Zhongshu had already handed over written materials for the joint investigation of Yuncheng and Xicheng to the Xicheng police, they still stubbornly insisted on investigating the series of robberies in Xicheng separately.Gu Baoxiong even lied and claimed that he had not seen the report.Qin Chuan questioned Gu Baoxiong's inaction and had dinner with him that night to try to understand why he was unwilling to cooperate with the Yuncheng police.Gu Baoxiong recalled the past experience of the police in the two places letting go due to different ideas in handling cases, and insisted on investigating the case separately.Qin Chuan decided to go to Yuncheng in person to coordinate.

At the Yuncheng Public Security Bureau, deputy director Chang Bin bluntly expressed his unwillingness to merge the investigation with the Xicheng police.Qin Chuan patiently persuaded, and finally Chang Bin reluctantly agreed to cooperate.Qinchuan decided to take Xicheng investigators to Han'an and Hu Zhongxing's hometown to investigate and visit, and asked the Yuncheng police to investigate first.He himself took Xicheng police officers to Lanjiang to investigate Hu Zhongxing's purchase of guns, and emphasized that the two places must share clues and evidence.

Wu Yingde called to inquire about the progress of the case, and Qin Chuan truthfully reported the difficulties faced.Wu Yingde encouraged him not to be discouraged and decided to send Zhao Fei to assist Qin Chuan.Qin Chuan rushed to Lanjiang with Yue Gang and Zhao Fei. With the help of the Criminal Investigation Detachment of Lanjiang City Public Security Bureau, they checked the files on gun reselling day and night, but found nothing.Hua Hin received news from Myanmar, but no valuable clues were found.The case reached a deadlock and Qin Chuan was exhausted, but he was sure that Hu Zhongxing had nothing to do with the Xicheng series of cases, but lacked evidence to convince Gu Baoxiong.

Through ballistic analysis, Cao Zhongshu, an expert from the provincial department, confirmed that the five shootings in Yuncheng and Xicheng were caused by the same pistol. This gun was an M20 model smuggled into the country from Myanmar.Police investigation found that Hu Zhongxing had gone to the Lanjiang area on the China-Myanmar border to buy guns, and he also had a criminal record of robbery.Qin Chuan and Cao Zhongshu personally went to Lanjiang to conduct an in-depth investigation. They reviewed in detail all the files related to gun smuggling since the founding of the People's Republic of China, but failed to find any clues related to Hu Zhongxing.In addition, they also sent undercover police officers to Myanmar to investigate purchase records, but they also failed to find any trace of Hu Zhongxing.

Faced with this situation, Qin Chuan suggested not to consider Hu Zhongxing as a suspect for the time being and to reorganize the existing clues.However, Gu Baoxiong insisted that Hu Zhongxing was the murderer and requested the issuance of a Class A wanted order.Qin Chuan expressed firm opposition to this. He believed that applying for the highest-level arrest warrant without conclusive evidence was irresponsible behavior.The two had serious differences of opinion and eventually quarreled.After Tao Wenming, director of the provincial department, learned of the incident, he called Qin Chuan to persuade him to stay calm.Qinchuan suggested that Wu Yingde should take the lead in setting up a task force to go to Xicheng to investigate. Tao Wenming agreed with this and encouraged Qinchuan to act boldly.Qin Chuan was encouraged by this.

At the same time, Deng Guangrong and his colleagues in the monitoring center are working day and night to investigate suspicious persons along the No. 905 bus.They suddenly discovered a person who was very similar to the suspect, but colleagues thought that Deng Guangrong might have seen it wrong and advised him to take a rest.Later, Wu Yingde, Cao Zhongshu, Lei Xiuping and others arrived in Xicheng and were warmly received by Qin Chuan and Yue Gang.

Deng Guangrong was eager to find team leader Liang Zheng to check the surveillance video on the bus, but Liang Zheng wanted to settle the expert team members first.However, both Qin Chuan and Wu Yingde hoped to check the monitoring as soon as possible, so Deng Guangrong took them to the data center.When checking the video, Qin Chuan found a person who deliberately lowered his hat and avoided the camera. He believed that this person was probably the suspect.Therefore, he assigned Liang Zheng to mobilize manpower to investigate the surveillance videos of bus No. 905 and within 200 meters along the route within 20 days, and hoped to complete it within a week. At least 200 police officers would be required to participate.

However, Liang Zheng encountered difficulties when assigning tasks. All departments and police stations could not spare enough manpower.After a lot of hard work, he managed to gather eighty people.He told Qin Chuan his difficulties, and Qin Chuan also understood his difficulties.So, they decided to gather these 80 people together and view the surveillance video frame by frame.Qin Chuan also personally held a mobilization meeting and directed it on the spot.

In order to have a deeper understanding of the case, Qin Chuan personally took the No. 905 bus, made detailed records of the road conditions and community layout along the route, and conducted on-site inspections.After careful investigation, Deng Guangrong quickly identified a suspect.The suspect's appearance coincided with the time of the crime, and he went to the breakfast stall in front of the bank to buy meals at fixed times many times.Qin Chuan listed him as a key investigation target and went to investigate in person.He also asked Qian Yongli, director of the Linlu Branch in his jurisdiction, to send police officers to conduct investigations near the bank, and assigned Deng Guangrong to continue screening nearby surveillance videos.The investigation work gradually achieved results, and the morale of the police officers also increased. Wu Yingde was very pleased with this.

The police officers stayed up late to check the surveillance video, and Tao Wenming called Qin Chuan to learn about the progress of the case.Qin Chuan immediately reported to his superiors and said that he would go all out to help Qin Chuan solve the case.Wu Yingde, Cao Zhongshu and Lei Xiuping had stayed up late for many days and were exhausted.Qin Chuan saw this and was anxious in his heart. He was worried that they would be exhausted, so he asked Shi Yan to book a flight for them back to the provincial capital.

Qin Chuan personally led the police officers to the banks along the line to investigate, but found that the surveillance cameras at the entrance of the banks were out of order.He was very angry about this because thousands of police officers in Xicheng were searching for suspects day and night, but the surveillance in key places could not be used.He immediately sent someone to replace the camera.Soon, the police discovered a suspicious person from the surveillance near the Internet cafe, and Qin Chuan determined that he was the person on the No. 905 bus.

Qin Chuan recognized the suspect from the surveillance video and saw him entering the Internet cafe. He immediately led his team to the Internet cafe to investigate.On the way, he noticed that Hu Zhongxing's reward notices were posted in the streets and alleys. Worried that this would alert others, he ordered the criminal police captain to tear down all nearby notices.Sure enough, after Zhang Kehan ​​saw the notice on the street, he was frightened and hurriedly hailed a motorcycle to escape.

After Qin Chuan arrived at the Internet cafe, he immediately asked to see the list of people who came to the Internet cafe on the 27th and checked them one by one.Deng Guangrong was responsible for calling the people on the list to confirm. Among them, only Zhang Feng denied that he had been to the Internet cafe.Qin Chuan immediately sent people to arrest Zhang Feng and carefully checked the computer he used.After interrogation, Zhang Feng confessed that he had taken a passenger to Hexi. Because he had no change to give him, the passenger took his ID card.Zhang Feng also recalled that the man's accent sounded like that of Yuncheng.

Based on Zhang Feng's ID card information, Shi Yan, Deng Guangrong and others investigated the computers that had used the ID card one by one.They found that the man not only browsed the progress of the Yuncheng and Xicheng cases, but also watched several crime-themed films.Qin Chuan thus determined that the person using Zhang Feng's ID card was the murderer.He asked Deng Guangrong to continue investigating on the computer, and finally found the suspect's photo.The Internet cafe owner also recalled that the man was very clean and liked to eat fruits.

The identity of the murderer finally came to light. Deng Guangrong, Shi Yan and others were excited, and Qin Chuan also breathed a sigh of relief.However, due to overexertion, he suddenly suffered from unbearable abdominal pain, but he still managed to sort out the suspect's criminal psychology and motive for committing the crime.Qin Chuan was sweating profusely in pain, and Shi Yan rushed to support him in time.Based on clues, Qin Chuan concluded that Zhang Kehan ​​might have hidden in the cemetery on the mountain.

After Qin Chuan returned to the provincial capital, Zhao Fei accompanied him to the hospital for a physical examination, and it was found that he had a hemangioma in his liver.The doctor advised him to operate immediately, but Qin Chuan insisted on catching the murderer first.However, once a hemangioma ruptures, it can be life-threatening.He Qinglian and Qin Haizheng rushed after learning the news, and He Qinglian forced Qin Chuan to have surgery immediately.Qin Chuan had no choice but to ask Zhao Fei to go to Xicheng to arrest the criminals, and called Tao Wenming to ask for leave.Tao Wenming asked him to treat his illness with peace of mind and stop worrying about Xicheng's case.

Qin Haizheng has been by Qin Chuan's side and feels very sad to see him so emaciated by the illness.Qin Chuan told him to take good care of He Qinglian and Ye Haiping.He Qinglian bought a lot of daily necessities and supplements for Qin Chuan.On the other side, Zhang Kehan ​​secretly called his wife to remind her to take good care of her father and urged her to transfer money to her family as soon as possible.Zhang Kehan ​​also visited the bank and found that there were two security guards and police officers patrolling the streets regularly.

After Qin Chuan came out of the operating room, he immediately called his colleagues to learn about the progress of the case, regardless of He Qinglian's objections.Li Wen took Ye Haiping to visit Qin Chuan. Ye Haiping hugged Qin Chuan and cried non-stop, complaining that he didn't take good care of his body.Qin Chuan was worried about the case, but Ye Haiping was powerless and could only vent his anger on Li Wen, complaining that he had changed Ye Haiping's wishes without permission.He Qinglian hurriedly took Li Wen to buy food, and Ye Haiping was willing to shut up.

The weather forecast said there would be heavy rain in Xicheng tomorrow. Qin Chuan was very worried and called Shi Yan to remind Shi Yan to be careful of the suspect committing another crime.He thought about returning to Xicheng after being discharged from the hospital in two days.Sure enough, on June 28, it rained heavily in Xicheng, causing widespread traffic paralysis in the city.Zhang Kehan ​​was squatting at a construction site in Tianxi District. When he saw the boss of a construction company driving to the construction site, he drew his gun and shot the boss three times.The workers came after hearing the news, but Zhang Kehan ​​was frightened and ran away.

Shi Yan brought the police to the construction site and called Qin Chuan to report.Qin Chuan was anxious, but Zhang Kehan ​​had already fled away.He rode a car and continued on his way, and finally came to the railway track. He was accidentally pricked by an iron nail on the sole of his foot, and he cried out in pain.

He Qinglian and Qin Haizheng came to the hospital and found that Qin Chuan had been discharged and left, feeling anxious and angry.He Qinglian called Zhao Fei to complain, and Zhao Fei guessed that Qin Chuan went to Xicheng.He called Shi Yan and Shi Yan came to the office and saw Qin Chuan had arrived.When Qin Chuan came back from the airport, he was very anxious when he saw police officers with guns and live ammunition along the way.He believed that the suspect did not know how to fly, let alone take a train with such arrogance.Shi Yan advised Qin Chuan not to worry. Xicheng had dispatched all police forces to search, but in the end nothing was found.

Qin Chuan failed to fully recover after the operation. He was still concerned about the case and frequently called Shi Yan to inquire about the progress.Ignoring medical advice, he was discharged from the hospital early and returned to Xicheng. Shi Yan reported in detail the difficulties in the pursuit.Gu Baoxiong posted a reward notice without authorization, causing the suspect to disappear, and Qin Chuan speculated that he had escaped.

After Zhang Kehan ​​saw the reward notice, he realized that he was wanted, so he fled Xicheng overnight and chose to travel over the mountains to Yuncheng to avoid pursuit.Due to lack of manpower, only a dozen of the 80 police officers originally deployed by Qin Chuan were still checking surveillance videos day and night. Eventually, one police officer became blind due to overwork, and Qin Chuan immediately arranged for him to seek medical treatment.

Qin Chuan wanted to ask Gu Baoxiong for reinforcements, but was declined by him. When he was feeling angry, Wu Yingde called to ask about the case. Qin Chuan confided his difficulties to him, and Wu Yingde persuaded him to face the limitations of the grassroots police force.

Zhang Kehan ​​sneaked home and learned that his father had passed away. He asked his wife for money in an attempt to evade pursuit, but he learned that his wife had used the stolen money for loan sharking. The two had a dispute and eventually divorced.

Qin Chuan received a call from his wife and learned that his mother had passed away. He was heartbroken, but still insisted on returning to Xicheng to continue investigating the case.Tao Wenming wanted to send him to Southeast Asia to perform a mission, but Qin Chuan vowed to capture the murderer in this case. Tao Wenming reluctantly agreed to return to Xicheng and sent Zhao Fei to Southeast Asia instead.

After Qinchuan returned to Xicheng, Gu Baoxiong personally greeted him and expressed his willingness to fully cooperate with his work.Qin Chuan convened the police officers to discuss the case and proposed to investigate from the source, re-describe the suspect's characteristics and personality, and calculate the time and place of his next crime.The police officers actively discussed and finally determined that the next target city was Jiacheng along the Hua River.

Zhang Kehan ​​escaped after pretending to be a robbery in Zhongcheng. Qin Chuan took the initiative to take responsibility, immediately organized police forces to conduct surveillance throughout the city, and sent Deng Guangrong and Yue Gang to assist.Tao Wenming was worried about Qin Chuan's health and sent Zhu Junjie and Captain Zhuang to reinforce him.Qinchuan set up a command center in the gymnasium, mobilized police and students to assist in monitoring and surveillance, and suggested that the entire city publish a reward notice.

The policemen set up a dragnet all over the city and conducted strict searches and interrogations on every passerby. At the same time, reward notices were posted all over the streets and alleys.When a villager went up the mountain to cut firewood, he accidentally discovered a black snakeskin bag containing fruits and dry food in a cemetery.When Zhang Kehan ​​discovered the villagers, he pursued them, scaring the villagers into hurriedly fleeing home.

The villagers then asked their neighbor Lao Liu for help, and Lao Liu suspected that the man was the murderer who offered a reward for his capture.So, they came to the cemetery again, only to find that the man had disappeared without a trace, but the black snakeskin bag was still there.They opened the bags and found items including fruit, fried soybeans, large buckets of water and sleeping bags.They immediately went to the command center to report. After Qin Chuan learned the news, he personally led people to the cemetery.

Zhang Kehan ​​was in a hurry to escape and had no time to take away his bag.Qin Chuan carefully checked the items in the bag and found the shopping receipt from Red Sun Supermarket.He immediately sent someone to the supermarket to learn about the situation, and at the same time retrieved the supermarket's surveillance video.In the video, Zhang Kehan ​​deliberately looked up at the surveillance camera while buying bread and water, seemingly openly provoking.Qin Chuan compared the photos collected at the crime scene with the images in the surveillance video and confirmed that this was the same person.

However, when Qin Chuan asked Deng Guangrong to call up the surveillance on the street in front of the supermarket, he found that the surveillance camera was broken.This important clue was cut off like this. Qin Chuan was so angry that he flew into a rage. The Zhongcheng Public Security Bureau Chief admitted his mistake to him again and again.But technicians quickly extracted the suspect's DNA, and Qinchuan sent police officers to compare it.

At the same time, a villager in Xikou Village, Songshuping Town, Yuncheng City, hurried to the Shaxikou Police Station to report the crime after seeing the reward notice.He recognized the man as Zhang Kehan, who lived in the village next to him.The police soon discovered that Zhang Kehan ​​had a gun-related record and was sentenced to three years in prison for selling firearms.But because he was away from home at the time, the police did not continue the investigation.

The police came to Zhang Kehan's home, collected blood from his mother and son for DNA testing, and finally determined that the shooting and robberies in Yuncheng, Xicheng and Zhongcheng were all committed by him.However, Wu Haizhou, the director of Songshuping Branch, temporarily concealed the matter from the Zhongcheng Command Center because he was worried about being held accountable.He sent people to Lanjiang to check Zhang Kehan's record of selling guns, and set up controls near Zhang Kehan's home.

After Qin Chuan learned that the suspect's name was Zhang Kehan, he immediately called Wu Yingde for help and rushed to Yuncheng himself.In Yuncheng, they met Captain Zhuang, Lei Xiuping and others.Director Chang took the initiative to admit that he missed Zhang Kehan ​​due to negligence in police work. Qin Chuan was very angry about this.Captain Zhuang stood up to persuade Qin Chuan and pointed out the mistakes of the Songshuping branch.He asked Qin Chuan to arrange the follow-up work, and everyone worked together to capture Zhang Kehan.

At the same time, He Qinglian fell ill due to a cold and fever, and Qin Hai was taking good care of her.But her condition never improved and her high fever persisted.When Qin Chuan called to inquire, He Qinglian concealed her condition.But Qin Chuan still guessed that her condition was serious and asked Qin Haizheng to take her to the hospital.Wu Yingde also came to visit Qin Chuan overnight and advised him not to be too stressed.They discussed the next action plan together and were determined to capture Zhang Kehan.

The police visited Zhang Kehan's neighbors and relatives and learned that he was usually lazy and unemployed, but he had great ambitions and had a special liking for guns.Cai Yuqin revealed that Zhang Kehan ​​admired Zhang Jun very much and handed over all the proceeds from the robbery to his family.He maintained contact with Cai Yuqin through a specific phone card, and the calls used cryptic language.When Zhang Kehan ​​left home, he casually mentioned that in the future, a woman would send money to Cai Yuqin on his behalf.

In the early morning, sanitation workers found a black cloth bag on a seat in the city center square, containing a magazine full of bullets.The police arrived at the scene quickly after receiving the report and launched a rigorous search of the surrounding area.Due to the lack of monitoring facilities at the scene, they immediately returned to report to Qinchuan.Zhang Kehan ​​took advantage of the police's evacuation and escaped quietly.

Cao Zhongshu compared the bullets overnight and confirmed that the bullets in the square were exactly the same as those used by Zhang Kehan ​​in the Zhongcheng robbery, and Zhang Kehan's DNA was left on the magazine.As a result, Zhang Kehan ​​was identified as the culprit of the series of shootings in Yuncheng, Xicheng and Zhongcheng.Lei Xiuping and Zhu Junjie believed that Zhang Kehan ​​deliberately left the magazine in the downtown area, which was a blatant provocation to the police.However, Qin Chuan believed that Zhang Kehan's move was intended to confuse everyone and make people mistakenly think that he was still in Yuncheng, but in fact he had already moved away.

Qin Chuan's guess came true, Zhang Kehan ​​had fled to Floating City.While checking in at a small hotel, he accidentally discovered his reward notice.At the same time, the police station called the hotel and asked the proprietress to carefully check the guests.Zhang Kehan ​​was terrified and fled in a hurry.

The police tightened their control and Zhang Kehan ​​fled in all directions.He came up with a plan and decided to hide in a pedicure shop.He selected Azhen, a 22-year-old masseuse, and took the initiative to express his friendship and learned that she was unable to engage in heavy manual labor due to a heart disease and could only rely on massage to make a living and support her younger brother's education.Zhang Kehan ​​lied that he was a businessman, promised to take Azhen to Yuncheng for treatment, and supported her at a price of 40,000 yuan per month.Azhen readily accepted, resigned immediately, and went to her rental house with Zhang Kehan.

After eight years of unremitting efforts, Qin Chuan and the police finally revealed the truth and confirmed Zhang Kehan ​​as the murderer.Zhang Kehan ​​was cunning and arrogant. He deliberately left a magazine in a busy city to provoke the police, and then disappeared.Qin Chuan was worried, and Wu Yingde comforted him not to be too stressed.Qinchuan put forward a bold idea and decided to deploy defenses along the Hua River.Wu Yingde fully supported and promised to accompany him to investigate to the end.

Qin Chuan and Wu Yingde went deep into Zhang Kehan's possible hiding place, the cemetery, to investigate.Based on Zhang Kehan's character traits, Qin Chuan predicted his escape route.Azhen accidentally discovered Zhang Kehan's true identity and was horrified, fearing that she would be killed.Zhang Kehan ​​frankly admitted his crime and revealed that he planned to do something big again, and then take Azhen away.

Qinchuan concluded that Zhang Kehan ​​would return to Yuncheng, so he decided to set up the command center in Yuncheng.Wu Yingde agreed with his analysis and immediately went to Yuncheng to join them.Zhang Kehan ​​brought Azhen to Yuncheng, rented a house and settled down, then hurried out.Azhen was afraid of being alone and sent a message to Zhang Kehan.Zhang Kehan ​​claimed that he was going to do something big and would take Azhen to see a doctor after the event was completed.

After Qin Chuan, Wu Yingde and others arrived in Yuncheng, they formulated a detailed arrest plan based on Zhang Kehan's personality characteristics and assigned tasks to the police officers.

In order to mislead the police, Zhang Kehan ​​found a massage girl from a foot massage shop as a cover and took her to Yuncheng with him.He visited Songshuping Zhongan Bank in advance, and then launched the operation at 9:34 on August 10, 2012.He shot and robbed a couple who had just withdrawn money from the bank, injured the security guard who came to stop them, and then fled with the 70,000 yuan in cash.

After Zhu Junjie reported the situation to Qin Chuan, Qin Chuan immediately concluded that this was Zhang Kehan's doing.He quickly mobilized police officers to check surveillance videos near the bank to determine Zhang Kehan's escape route.Qin Chuan and Zhu Junjie rushed to the scene immediately, and based on clues provided by the masses, they learned that Zhang Kehan ​​took a vehicle to Chengqiao.Qin Chuan opened the map and found that there were four routes to choose from from Chengqiao, so he immediately ordered Captain Chen to send police officers to intercept them in these four directions.

At the same time, Yan Chao, an investigator from the Criminal Investigation Detachment of the Yuncheng Railway Public Security Bureau, discovered Zhang Kehan ​​who was running away in a panic while conducting investigations along the railway line.Yan Chao loudly warned Zhang Kehan, but Zhang Kehan ​​shot him to death.After Qin Chuan learned of the incident, he immediately sent someone to retrieve videos along the railway to investigate Zhang Kehan's escape route.Because the police were short of manpower, they summoned students from the police academy to review the footage.

Technicians measured the shell casings left at the crime scene and confirmed that Zhang Kehan ​​used the same gun that he had used to rob the sentry.Qinchuan immediately ordered police officers across the city to conduct investigations at stations, docks and highway intersections.At the same time, police officers from Xicheng and Fucheng also came to assist the Yuncheng police in arresting the criminals.However, Zhongcheng police publicly announced that Yuncheng police had let the suspect go.

Qin Chuan felt deeply pressured. He held an emergency meeting and called on the police officers not to compete for credit, but to go all out to catch the criminals.After Zhang Kehan ​​killed the patrolling railway policeman along the railway, he fled in the direction of Yunle Mountain.Since Zhang Kehan's home is near Yunle Mountain, the Yuncheng police sent a large number of police officers and garrison troops to conduct a blanket search, but found nothing.The task force also set up its headquarters in Yunle Mountain, with Xie Daoxin personally taking command.

Feeling great pressure, Qin Chuan asked Tao Wenming for instructions to mobilize the masses to help arrest Zhang Kehan.Tao Wenming immediately decided to issue a Class A wanted order and called on the public to report Zhang Kehan's whereabouts.Qinchuan issued a large number of wanted notices, posted them in every corner of Yuncheng, and broadcast them continuously on TV.

A female customer saw Zhang Kehan ​​in Dashun Mall and immediately called the police.The police officers quickly rushed to the mall to conduct an investigation, but Zhang Kehan ​​had disappeared without a trace.Qin Chuan checked the surveillance video of the mall and determined that the person was Zhang Kehan.He immediately went down the mountain to the mall to verify the situation and sent the mall's surveillance video to Deng Guangrong for comparison.At the same time, he also invited Wu Yingde to Yuncheng to witness the arrest of Zhang Kehan ​​in person.

Zhang Kehan ​​called Azhen to the mountain, gave her 60,000 yuan, and asked her to give 50,000 yuan to his wife and son respectively.Azhen felt scared, but after Zhang Kehan ​​promised to do something big again, he took Azhen to travel abroad.After careful comparison, Deng Guangrong confirmed that the person who appeared in the mall was the murderer Zhang Kehan.Qin Chuan immediately called Xie Daoxin to come down the mountain and promised that Zhang Kehan ​​would be captured in one fell swoop this time.

After Wu Yingde hurried to Yuncheng, Qin Chuan took him to check the surveillance video of the mall.They discovered that Zhang Kehan ​​had been talking on the phone while walking.However, Yuncheng police refused to admit that the man in the mall was Zhang Kehan ​​because Zhang Kehan ​​never used a mobile phone.Qin Chuan was very angry about this and ordered the police to investigate the mobile phone.

After the police issued a Class A arrest warrant with a reward of 500,000 yuan on TV, they quickly discovered that the mobile phone used by Zhang Kehan ​​was not his real name.When he was on the phone with Azhen, Azhen heard that Zhang Kehan ​​robbed 200,000 yuan but only gave her 60,000 yuan.Zhang Kehan ​​said on the phone that he was going to do another big thing on the 14th.Since tomorrow is the 14th, Qinchuan immediately held an emergency meeting to discuss the action plan to arrest Zhang Kehan.

Qinchuan decided to ask the Yuncheng police to mobilize 300 plainclothes policemen tonight to carry out key defenses on three lines.He issued the final order, reminding the police officers to maintain a high degree of vigilance, never to alert the snake, and to strive to catch the person alive.At three o'clock in the morning on August 14, 2012, four hundred plainclothes police officers had assembled and arrived at the designated location.Qin Chuan took Zhu Junjie and Wu Yingde and then set off.Zhu Junjie suggested going to Azhen's residence to squat, but Qin Chuan knew that Zhang Kehan ​​had strong anti-reconnaissance capabilities, so he decided to go for a walk by the river to observe the situation.

At 6:32 in the morning, Zhang Kehan ​​came out of his home and was followed in sections by plainclothes police.He was very alert and walked faster and faster.Two plainclothes policemen pursued him.When Zhang Kehan ​​realized he was going the wrong way, he pulled out his gun and attacked the police.

Zhang Kehan ​​originally planned to carry out a big operation on the 14th, and planned to take Azhen away after success.For this reason, he had already stepped on the spot and planned his escape route in advance.However, at 6:30 in the morning the next day, when he walked out of his home, he unexpectedly discovered that plainclothes police were following him.Zhang Kehan ​​suddenly became nervous. He tried to get rid of the police, but accidentally walked into a dead end.When he spotted two police officers approaching, he turned and shot them, but was eventually shot dead on the spot.

After Qin Chuan learned of Zhang Kehan's death, he immediately went to the scene with Wu Yingde.They both breathed a sigh of relief when they saw Zhang Kehan, who was full of evildoers, lying in a pool of blood.Over the past eight years, they and thousands of police officers have spent a lot of effort searching for Zhang Kehan's traces, and now they have finally brought him to justice.Qin Chuan then notified his family members to come and confirm his identity, and arranged for the technical department to further verify Zhang Kehan's DNA.

After handling Zhang Kehan's case, Qin Chuan persuaded Azhen to find her way back and told her that Zhang Kehan ​​only used her as a tool to escape.If this operation succeeds, Zhang Kehan ​​will not hesitate to kill Azhen to silence her.After hearing this, Azhen felt remorseful. She was well aware of Zhang Kehan's cruelty and ruthlessness and could only act according to his requirements.Qin Chuan was deeply saddened by this.

At the same time, Zhao Fei returned from the Philippines and couldn't wait to see Qin Chuan.Qin Chuan warmly invited him to come to his house for dinner, and Zhao Fei brought Li Wen with him.At the dinner table, everyone shared each other's lives and stories, and the atmosphere was very harmonious.

On the other side, Li Wen originally did not want Ye Haiping to become a police officer, so she announced that she would go abroad to study for IELTS.However, Ye Haiping secretly took the civil service examination and was admitted together with Qin Haizheng.After Li Wen learned the truth, although he was a little angry, he finally hugged Ye Haiping tightly, and the mother and daughter hugged each other and cried.

Ye Haiping was assigned to the Criminal Investigation Brigade of the High-tech Branch of the Peixing Municipal Public Security Bureau as a trainee, and was later transferred to the Criminal Technology Brigade.She threw herself into intense work on the first day she reported for duty.Last night, a shooting occurred in the Hi-tech Zone. Someone fired more than 20 shots from a residential building into a hotel.The criminal investigation detachment acted quickly to control all the residents of the residential building and planned to conduct psychological tests on them.Ye Haiping is very enthusiastic about this. She is eager to try and participate in the detection of this case.

During the psychological test in the residential building, Gao Xiaoying acted together with the police from the technical brigade. Most of the residents showed a cooperative attitude. However, one couple seemed extremely nervous and their speech was confused.Gao Xiaoying was keenly aware of their suspiciousness, so she led Ye Haiping, Yao Jie and others to search their home, and eventually found an illegally held pistol. The couple also admitted their crimes on the spot.This incident inspired Ye Haiping's strong interest in the field of psychological testing. He planned to specialize in this direction after his internship. Gao Xiaoying expressed his full support for this.

On the other side, Qin Chuan personally cooked and prepared a table of delicious food for Cao Zhongshu and his son Cao Yang.Cao Yang just returned from studying abroad in medical school and became a policeman focusing on DNA testing.Ye Haiping and Qin Haizheng were full of curiosity about this long-lost friend and asked him various questions.When Qin Haizheng mentioned his intention to crack down on electronic fraud, Cao Yang expressed his firm support.

At the same time, Li Wen and his colleagues went through many hardships and finally successfully established an intelligence information center, which was equipped with a complete set of advanced telecommunications fraud combat systems.Li Wen invited Qin Chuan and Cao Zhongshu to visit, and they were full of praise.However, at this moment, Zhu Junjie asked Qin Chuan for emergency help. A shooting occurred in the suburbs of Jingcheng, and the police quickly identified more than 40 suspects.Qinchuan decisively dispatched the Criminal Investigation Team to investigate, and Li Wen recommended the experienced Feng Chi as the team leader.

At the crime scene, Lei Xiuping led forensic doctors Su Chang and Cao Yang to conduct a detailed autopsy and collect key blood samples.The police officers at the intelligence center quickly investigated the suspects and successfully identified the major suspect Deng Bingcai.After a series of intense pursuit operations, the police successfully arrested Deng Bingcai and he confessed his crime.However, before the DNA results were released, Deng Bingcai had already confessed, which made Su Chang feel a little disappointed.Despite this, the police transferred him to the prosecutor's office in accordance with the law.

In addition, Su Chang expressed his dissatisfaction with the new way of solving crimes in front of his colleague Guo Xin.In order to solve this problem, Lei Xiuping decided to hold a study class to popularize the knowledge of big data in solving crimes to forensic doctors and technicians.In class, he elaborated on the pros and cons of new technologies and traditional methods of solving crimes, and emphasized the importance of forensic identification in solving crimes with new technologies.Su Chang benefited a lot from this study, and it also gave her a deeper understanding of the importance of combining new technologies with traditional detection methods.

At the same time, Yang Xiong and Gu Wenlong of the Criminal Investigation Brigade of Qingjiang City, Yuanlin Prefecture suddenly heard an explosion coming from the mountain during lunch, and they immediately rushed to the scene to investigate.It turned out that an explosion occurred in a large casino, causing many casualties.After hearing the news, Qin Chuan quickly rushed to the scene to participate in the investigation.At the case analysis meeting, Qin Chuan analyzed in detail the possible reasons and motivations for the murderer to blow up the casino, and led the police to conduct an in-depth investigation and pursuit of the murderer.

Qin Chuan demonstrated excellent leadership and investigative abilities.He first laid a solid foundation for the detection of the case through careful deployment.He appointed Guo Jiaqi as the leader of the comprehensive team, and gave each police officer a clear division of labor and divided them into groups to ensure that there was someone responsible for each task and someone to follow up.At the same time, he required the police officers to meet at eight o'clock every night to report on work progress. This move not only strengthened communication and collaboration between the teams, but also made the investigation of the case more orderly and efficient.

During the investigation of the crime scene, Qin Chuan showed keen insight and judgment.He noticed that the shacks in the nearby woods were made of the same materials as the casinos, and were probably prepared for casino visitors.This discovery provides new clues for the detection of the case.At the same time, he did not jump to conclusions easily, but conducted in-depth investigations and interrogations on each suspect to ensure the fairness and accuracy of the case.

When facing the suspect Ajin, Qin Chuan did not immediately convict him because of his suspicious behavior, but maintained a calm and objective attitude.Through interrogation and investigation, he discovered doubts about Ajin, but he did not ignore his reasonable explanation.This attitude towards suspects not only reflects Qinchuan's impartiality in law enforcement, but also avoids unjust, false and wrongful convictions caused by misjudgment.

During the investigation of the case, Qin Chuan also showed outstanding innovative thinking and problem-solving abilities.He dug up fragments of batteries, circuit boards and electric detonators at the scene by searching for people with objects. Through comparison and identification by technicians, he determined the brand and model of the battery used in the explosive device.Although this clue was eventually interrupted, his move still provided new ideas and directions for the investigation of the case.

In addition, Qin Chuan also attaches great importance to teamwork and the physical and mental health of police officers.After seeing Cao Yang working for two consecutive days and nights, he promptly advised him to take a rest, which reflected his care and love for the police officers.This people-oriented management concept not only enhances the cohesion and combat effectiveness of the team, but also makes police officers more willing to work hard to solve cases.

To sum up, Qin Chuan demonstrated outstanding leadership and investigative capabilities during the detection of the explosion. His calmness, objectivity, innovation and humanistic care provided a strong guarantee for the smooth detection of the case.

During continuous visits and investigations, the police officers learned that nearby villagers had a tradition of using explosives to fry fish. This discovery lifted Akin's suspicion, but the clues to the case were interrupted again.Faced with this dilemma, Qin Chuan made a bold suggestion - to mobilize the masses to collect clues by posting reward notices in the village.

At the same time, Yang Xiong received a report and learned that two boxes of explosives were missing from the quarry.He quickly rushed to the scene, gave a stern reprimand to the quarry owner, and compared the lost explosives with those at the explosion site to confirm that they were the same batch.This discovery provides a new direction for the investigation of the case.

As the weather gets colder, the work of investigators and technicians at crime scenes becomes increasingly difficult.They almost turned the scene upside down, but still failed to find any more valuable clues.The approaching Spring Festival made the investigators complain, but Yang Xiong and Qin Chuan firmly encouraged them to continue searching and provided help to investigators in difficulty.

The arrival of Lu Zhenbo brought a new turn to the case.He conveyed the state's decision to temporarily seal the scene and let the investigators take advantage of the holiday to rest.However, Qin Chuan and Yang Xiong were worried that people would disperse and decided to stay at the scene to celebrate the New Year.Their persistence infected everyone, and the investigators decided to stay and tide over the difficulties.

The recurrence of Guo Jiaqi's old illness made Qin Chuan even more worried.He insisted that Guo Jiaqi go back for treatment, but Guo Jiaqi firmly refused.At Qin Chuan's insistence, Guo Jiaqi reluctantly agreed to leave.On New Year's Eve, everyone had New Year's Eve dinner together, and Qin Chuan expressed his gratitude to everyone.After dinner, he took a walk alone and discussed the next work arrangements with Jiang Shan.

After the Spring Festival, Jiangshan made a suggestion to expand the search scope.After unremitting efforts, the investigators finally found the remote control of the explosive device.This discovery made Qin Chuan relieved. He asked everyone to have a good rest and sent the remote control to the technical department.At the same time, Yang Xiong also issued a search order, requiring investigators and police to search for traces of various remote controls throughout the city.

However, Zhao Lin, the expert invited by Lei Xiuping, did not collect DNA on the remote control.Faced with this dilemma, Guo Xin decided to explain the situation to Qin Chuan in person.After Qin Chuan learned about it, he knew that the DNA path was dead.After discussing with Jiangshan, he decided to ask the state to send experts to assist.

Not far from the explosion site, investigators accidentally discovered an intact remote control.Qin Chuan was keenly aware that this was most likely the key to detonating the explosive device.However, facing this unfamiliar remote control, everyone was at a loss.So Qin Chuan decided to turn to Ye Zhenhua, a professor at Yuanlin University.Professor Ye recognized it at a glance as a high-end two-way remote control for motorcycles.

Qinchuan and Jiangshan quickly discussed and decided to expand the scope of the investigation, requiring investigators to search for such remote controls within a radius of 200 kilometers.However, Yang Xiong and others found nothing after many days of searching.The deadline for solving the case is getting closer and closer, and Qin Chuan is extremely anxious.Upon seeing this, Jiang Shan immediately requested support from the Yuanyang Prefecture Criminal Investigation Detachment.Under the personal investigation of detachment leader Hou Yuankang, they quickly locked in the brand and manufacturer of this remote control.

After further investigation, they discovered that only eighteen units of the remote had been sold.Yang Xiong and others investigated these eighteen people one by one, but found no abnormalities.Faced with this dilemma, Qin Chuan did not give up. He firmly believed in his judgment and believed that there must be missing clues.

Jiang Shan was well aware of everyone's dissatisfaction and resentment, so he summoned Yang Xiong and others to enlighten them.Qin Chuan also advised everyone to understand his rigor and persistence.Encouraged by Yang Xiong, the investigators cheered up again and went to various agents to check sales records.

After three days of hard work, they finally matched the buyer of the remote control with the goods.However, this did not bring a breakthrough to the case.Jiangshan and Yang Xiong were in trouble again, with only five days left before the deadline.They decided to check it all over again, not missing any clues.

With the persistence of Yang Xiong and Long Xiang, they finally got the key information at a motorcycle repair shop in the suburbs.Through surveillance video, they identified two suspects - Liao Wenhu and Liao Yunbao.The police acted quickly and arrested the two men and found explosives and detonators in Liao Yunbao's home.

Faced with the interrogation, the two remained silent.Yang Xiong suggested inviting Yang Zhijiang, who had worked at the Longshan Town Police Station, for interrogation.Under Yang Zhijiang's patient persuasion, Liao Wenhu's psychological defense finally collapsed, and he explained the case in tears.

Liao Wenhu was deeply afraid that the relatives of the deceased would take revenge on his wife and children, so he begged Yang Zhijiang to protect his son.Yang Zhijiang agreed without hesitation, and then Liao Wenhu confessed the entire crime process.

Liao Yunbao approached Liao Wenhu, invited him to plan a big event, and promised that after the event was completed, he and his family would have a stable New Year.Liao Yunbao led Liao Wenhu to Ground Dragon's casino for a visit, planning to blow up the casino and frame the blame on Ah Jin, who was watching the scene, in order to snatch a huge sum of money.Seizing the opportunity, they smuggled two boxes of explosives from the quarry and went to a motorcycle repair shop two hundred miles away to buy two remote controls and batteries.

Liao Yunbao asked Liao Wenhu to conduct the experiment and arranged for them to quietly lurk around the casino.The weather was extremely cold that night, and Ah Jin sneaked home because he couldn't bear it.Liao Yunbao and Liao Wenhu took the opportunity to bury explosives in the casino.Liao Yunbao was on lookout outside, while Liao Wenhu entered the casino to observe the situation.On the afternoon when the casino had the largest number of people and the most frequent money flows, Liao Wenhu pressed the remote control and the explosive detonated instantly, killing fifteen people and injuring more than twenty others.The two were unable to carry out the subsequent robbery plan due to fear and could only flee in a hurry.

When the case finally came to light, Qin Chuan was relieved and immediately asked Jiang Shan to pack his luggage and prepare to leave.Yang Xiong persuaded them to celebrate together, but Qin Chuan was unwilling to take credit and hoped to leave the honor to Yang Xiong and the grassroots investigators.However, there are still two unresolved cases in Qingjiang that have been dragged on for sixteen years, and Qin Chuan decided to wait until this case is over before handling it.Yang Xiong couldn't convince him and had no choice but to let him go.Lu Zhenjiang hurried over to invite Qin Chuan to dinner to celebrate, but learned that he had left.

Qinchuan fell asleep until noon due to overwork, and Wu Yingde called to congratulate him.Qin Chuan endured the pain in his back and got up. He saw his wife He Qinglian busy in the kitchen. He admired the fish swimming in the fish tank and felt unprecedented warmth and tranquility.

Cheng Haoran hurriedly came to Gao Xiaoying for help, but Gao Xiaoying was not there.Ye Haiping followed Cheng Haoran to investigate the case.Zhu Meimei had not contacted her parents in her hometown for two weeks, so her parents rushed to Peixing. They suspected that Zhu Meimei's boyfriend Li Tian was not good for her and called the police.They also found that the fabric on the mattress had been cut off and concluded that Li Tian was trying to cover up evidence.

Ye Haiping, Cheng Haoran, and Ma Chaoyang came to Zhu Meimei's house. Ma Chaoyang reminded Zhu Meimei's parents to stay calm so as not to alarm the suspect.The investigators learned that Zhu Meimei was a model for a public relations company and met Li Tian at an event. Their relationship quickly heated up, and Li Tian even divorced because of it.

Investigators discovered that Li Tian had driven to the suburbs and back, and found Zhu Meimei's blood on the mattress.Gao Xiaoying asked Ye Haiping to conduct a psychological test on Li Tian, ​​and Li Tian expressed his willingness to cooperate.During the test, Li Tian seemed extremely nervous and the data curve showed no fluctuations. Ye Haiping had to interrupt the test twice.She listened carefully to Li Tian's answers and found that he had strong anti-reconnaissance capabilities and deliberately avoided key questions.

After discussing with Gao Xiaoying, Ye Haiping decided to change the test questions. She first assumed that Li Tian was the murderer and asked him whether he had put the body into a woven bag and buried it.Faced with Ye Haiping's continuous questioning, Li Tian finally showed his flaws. When he heard sensitive words such as woven bags and buried corpses, he became extremely flustered, and the data curve appeared abnormal.Based on this, Ye Haiping concluded that Li Tian was the murderer.

Ye Haiping conducted a psychological test on Li Tian, ​​and Li Tian successfully passed the test with his excellent ability to withstand stress.But then, Ye Haiping carefully designed a series of questions based on his own analysis of the criminal process and methods.These problems caught Li Tian off guard, and he exposed his weaknesses on key issues.Ye Haiping keenly captured this point and launched a series of questioning on Li Tian, ​​which finally caused Li Tian's psychological defense to collapse.After carefully sorting out the clues, Ye Haiping confirmed that Li Tian was the murderer of Zhu Meimei, and he also transported the body in a woven bag to the suburbs for burial.

Gao Xiaoying and Cheng Haoran in the auditorium also agreed with Ye Haiping's judgment.They noticed that Zhu Meimei was 1.74 meters tall, and a woven bag obviously could not contain her body.Therefore, Ye Haiping speculated that Li Tian might have dismembered the body.Cheng Haoran immediately instructed Ye Haiping to continue interrogating Li Tian to determine whether his murder was carefully planned.At the same time, Cheng Haoran personally led people to investigate Li Tian's out-of-city records in the past three months.

Under Ye Haiping's interrogation, Li Tian finally confessed everything.He regretted that he met Zhu Meimei and divorced because of her.In order to return to his previous happy life, he carefully planned the murder.He admitted that a month ago, he had conducted a raid outside the city and eventually buried Zhu Meimei's body on the outskirts of the city.Under the leadership of Li Tian, ​​the police officers found Zhu Meimei's body.Ye Haiping successfully solved the case for the first time with his professional skills and felt full of accomplishment.Cheng Haoran and Ye Haiping also cooperated very well, and they talked happily.

At the same time, He Qinglian insisted on giving Qin Chuan waist massage every day, and Qin Chuan's waist injury gradually improved.Only then did he learn that He Qinglian secretly took the physical therapy certificate in order to help him recover.When the provincial department asked for credit for the investigators of the Qingjiang explosion case, Qin Chuan gave all the credit to the grassroots police officers and technicians.

When Qin Chuan took Guo Jiaqi on a return visit to Qingjiang City, they were warmly received by Yang Xiong.He kept telling Qin Chuan about the growth and changes of the investigators of the Qingjiang City Criminal Investigation Detachment.When Qin Chuan came to the explosion site again, he recalled that he and the investigators spent day and night searching for clues here, and his heart was filled with emotion.

Under the leadership of Yang Xiong, Qin Chuan and others came to the former office of the Qingjiang two-case task force.Yang Xiong implored Qin Chuan to help solve this case that had been backlogged for eighteen years.Qin Chuan said that a decision needs to be made after reporting to the provincial department.Later, Yang Xiong invited Qin Chuan and Guo Jiaqi to participate in the traditional festival of ethnic minorities.At the banquet, Jin Minghai prepared a sumptuous banquet.Gu Wenlong used Jiu Jin to express his wish to Qin Chuan - the reason why he became a criminal police officer was to find the murderer and seek justice for Qiu Huanhuan.Gu Wenlong's excitement infected everyone, and both Jin Minghai and Yang Xiong were moved by it.

It turned out that Qiu Huanhuan was Gu Wenlong's classmate.Gu Wenlong has always regarded finding the murderer as his mission.On that night in 1998, Jin Minghai met Qi Huansheng on the way to work and was invited to play basketball together.However, when Jin Minghai received the call and rushed to the scene while on duty at the police station, he found that Qi Huansheng had been beaten to death and his gun was missing.Jin Minghai immediately notified Qiu Zhiguo to strengthen security work to prevent accidents.However, just over a month later, Qiu Zhiguo's family of three and Chen Xiaolan, who came to break up the fight, were brutally murdered.After investigation, it was confirmed that the murderer used Qi Huansheng's stolen gun.Gu Wenlong eagerly asked Yang Xiong and Jin Minghai for information about the murderer but found nothing. In his excitement, he even yelled at them.However, Yang Xiong was not angry and instead invited Gu Wenlong to eat to express his comfort.

After the incident, the provincial department quickly established a task force and dispatched experienced investigators Wu Yingde, Cao Zhongshu and Lei Xiuping to support.However, only a fingerprint with four fingers and a shoe print were left at the scene as clues.Yang Xiong, Jin Minghai and investigators conducted two years of visits and investigations across the country but found nothing.It wasn't until 2006 when Yang Xiong and Jin Minghai rushed back to Qingjiang that they learned that the state had decided to seal the case.Yang Xiong was deeply unwilling to accept this, but he had no choice but to accept the arrangement of being transferred to the state bureau.On the eve of departure, he went to Jin Minghai to drink and complain, and Jin Minghai tried his best to comfort him.Early the next morning, Jin Minghai personally sent Yang Xiong to report to the state.

After Jin Minghai bid farewell to Yang Xiong, he carefully kept the task force office in order.However, Yang Xiong's departure and return surprised everyone. He expressed his determination to stay in the Qingjiang Criminal Investigation Detachment, continue to track the two cases, and insisted on retaining the task force.Back in 2008, Gu Wenlong, a young man who had just graduated from the police academy, took a solemn oath in the office of the task force as usual.

Jin Minghai implored Qin Chuan to help solve two cases in Qingjiang.Although he has reached retirement age, he still decided to stay, hoping to witness the murderer being brought to justice.Yang Xiong also expressed his deep plea to Qin Chuan, hoping that he could stay in Qingjiang to continue the investigation.Qin Chuan was moved by their sincerity and decided to abandon his original travel plan. Guo Jiaqi assisted in refunding the air tickets, determined to get to the bottom of these two cases.

Since the scene of Qi Huansheng's murder had been destroyed, Yang Xiong and Jin Minghai took Qin Chuan to Qiu Zhi Country, which still maintained its original appearance when the crime occurred.Jiang Jizhong rushed over and expressed his gratitude to Qin Chuan for his assistance, and regretted that he could not solve the case before retiring.Qin Chuan firmly stated that he will go all out to find out the truth.

Qin Chuan was troubled by the case and could not sleep, so he discussed with Guo Jiaqi the use of new technologies to comprehensively clean up old cases.Guo Jiaqi is worried that he may be criticized for not being able to solve the case, but Qin Chuan firmly believes that as long as he perseveres, he will eventually succeed.Investigator Liu Lin and others sorted out the backlog of cases. Qin Chuan gave special instructions to screen out cases involving the mutilation of women and children, and reported to Yuan Zhen, deputy director of the provincial department, and received his full support.

When Qin Chuan visited Wu Yingde, he learned that although he failed to solve the case, he was deeply gratified by the enthusiasm and persistence of Qingjiang investigators.Wu Yingde handed over all the information he had investigated for many years to Qin Chuan, and Qin Chuan regarded it as a treasure.Qinchuan also invited hundreds of experts and technicians to join the task force, including Cao Yang and Su Chang.

Yang Xiong and Jin Minghai personally welcomed Qin Chuan and the members of the expert team, and Qin Chuan immediately held a case analysis meeting.Yang Xiong and Jin Minghai showed the clues collected over the years, while Gu Wenlong believed that the two cases were acts of revenge, and Wu Yingde believed that they were cases of property infringement.Jin Minghai discovered a cash shortage during Qiu Zhiguo's investigation and suspected that the murderer was motivated by financial embezzlement.However, Yang Xiong raised objections and pointed out that the ID cards of Qiu Zhiguo and his wife were missing, but the murderer did not use these ID cards to withdraw money.The two disagreed and argued.Qin Chuan interrupted their argument and proposed three directions for investigating the case.

Guo Jiaqi and Liu Lin lived in the same room. They had an in-depth discussion about the case and both believed that the four-digit fingerprint was the key to solving the case.Guo Jiaqi had to quit due to the recurrence of his ear disease while investigating the Qingjiang bombing case, but this time he was determined to go all out.He deliberately sat in front of the window and ate instant noodles, waiting for Qin Chuan to come out and walk around - this was Qin Chuan's habit for many years. When he was pacing back and forth in the corridor, he was always thinking about the case.So, Guo Jiaqi and Liu Lin went downstairs to find Qin Chuan.

Late at night, Qin Chuan couldn't sleep, and he wandered in the corridor of the courtyard.Guo Jiaqi and Liu Lin noticed that he was worried about the Qingjiang case, so they came to discuss countermeasures with him.Qin Chuan observed that the investigators in Qingjiang had put a lot of effort into this case that had been pending for eighteen years, but they had different opinions.At the meeting, Qin Chuan did not rush to express his position, but decided to start the investigation again from the crime scene and review all the physical evidence personally.

Early the next morning, Yang Xiong led Qin Chuan and the expert team to Qiu Zhi's country.Lei Xiuping and Cao Zhongshu took over the case again, and they conducted a meticulous investigation of the scene.Cao Yang, Su Chang and others did not dare to be careless at all, for fear of missing any clues.They worked overtime and conducted detailed tests on the evidence collected at the scene.

At the same time, Yang Xiong, Jin Minghai, Gu Wenlong and others were anxiously waiting for the results in the office.They waited for a long time, but still did not see Cao Yang and Su Chang showing up, so they went to the laboratory to visit them in person and sent them hot meals.However, after careful examination by Cao Yang and Su Chang, they did not find valuable DNA information or a second fingerprint.Although Yang Xiong and others were filled with disappointment, they still forced themselves to look cheerful and comforted Cao Yang and Su Chang.

Qin Chuan presided over a case analysis meeting. He concluded that the case was a property embezzlement case and the suspect should be a local.Qin Chuan elaborated on his views and won the approval of Yang Xiong, Gu Wenlong and others.He suggested that the police concentrate on fingerprint collection. Guo Jiaqi and Liu Lin greatly appreciated Qin Chuan's judgment.Subsequently, Qin Chuan arranged for Guo Jiaqi to stay in Qingjiang and be responsible for fingerprint collection, while he took Liu Lin and Cao Yang to Donglin County, Lincheng City to investigate another murder case.

Cao Zhongshu's work has come to an end for the time being, and he is about to return to the provincial capital.Cao Yang came to see him off and accidentally discovered that he was taking medicine and was deeply worried about his health.Cao Zhongshu made excuses to pass by, and told Cao Yang to follow Qin Chuan in handling the case.Early the next morning, Yang Xiong came to see Qinchuan off, specially bringing specialties from his hometown.

Tao Weizhi, captain of the Donglin County Criminal Investigation Detachment in Lincheng City, was waiting for an important piece of physical evidence in Pingcheng after he learned that Qinchuan had come to investigate the Donglin murder case.He called Su Chang and asked about the itinerary of Qin Chuan and others.Qin Chuan expressed his admiration for Tao Weizhi's unremitting search for clues over the past six years, and asked him, Liu Lin, and Su Chang to introduce the Donglin murder case in detail.

This case occurred on April 19, 2010. Three little girls went missing while going to catch tadpoles and did not return home until ten o'clock in the evening.The family members searched separately and finally found their bodies in an abandoned cave dwelling on the mountain.The provincial department attaches great importance to this case and lists it as a key supervision case on the 15th.

Early the next morning, Liu Lin, Su Chang and Lei Xiuping arrived at the crime scene.Zhong Zhiming, deputy director of the Lincheng City Public Security Bureau, has been waiting here for a long time. He transferred six capable personnel from the municipal bureau to assist in the investigation.The Secretary of the Donglin County Party Committee also personally went to the scene to take command and mobilized the entire county police force to investigate the case.

Fang Wen, director of the Donglin County Public Security Bureau, Yan Jun, director of the DNA laboratory of the Lincheng Criminal Investigation Detachment, Yang Wei, captain of the county bureau's criminal investigation brigade, and deputy captain Cheng Shufeng were busy until dawn.They extracted evidence from the scene and performed autopsies on the three girls.It was initially determined that they died of suffocation and had been sexually assaulted before their death.

Yan Jun briefly introduced the test results: there were five beverage bottles at the scene, three of which contained tadpoles, which were tested to belong to the three victims; there were also two Huangshan brand cigarette butts, and the DNA on the cigarette butts was consistent with the residues in the bodies of the three girls.The objects were consistent and the suspect was determined to be the same person.Yang Wei and Cheng Shufeng also reported on the progress of the investigation respectively: the suspect encountered three little girls on the afternoon of April 18, sexually assaulted them, strangled them to death and hid them in an abandoned cave dwelling.

At this time, Tao Weizhi, deputy captain of the County Bureau's Criminal Investigation Detachment, hurried over and eagerly asked Yang Wei for photos of the scene.Yang Wei dealt with him impatiently and then sent him away.However, Tao Weizhi was not reconciled. He expressed doubts to Su Chang that the murderer could be found based on DNA test results alone.Soon after, he received a call from the investigator saying that a suspicious old bachelor had been found, and he rushed over immediately.

After Su Chang returned to her residence, Tao Weizhi hurried over to ask her about the DNA testing situation.Tao Weizhi interrogated the old bachelor all night, but the old bachelor refused to plead guilty.Su Chang suggested a DNA test to prove innocence. Tao Weizhi arranged the test with the consent of the leader, and the results proved that the old bachelor was not the murderer.This experience allowed Tao Weizhi to see the power of DNA testing technology for the first time.

Subsequently, Su Chang conducted multiple rounds of DNA testing on young men with the same blood type in the village, but no suspect was found.Tao Weizhi was unwilling to give up. He traveled around to investigate and had been busy for four years with no results.Until 2014, when he saw the news on TV that archaeological experts had found the descendants of Cao Cao's family through DNA technology, his eyes suddenly lit up.He immediately found Su Chang's business card and called for help overnight.Cao Yang happened to be present and recommended Wang Ran, a classmate of the Yuhe Criminal Investigation Detachment, to him.Tao Weizhi immediately went to Yuhe to ask Wang Ran for help, and finally found a descendant of the Gu family through Wang Ran who matched the suspect's DNA.

Wang Ran discovered that the DNA of the Gu family in the village matched that of the suspect. This excited Tao Weizhi, who was eager to take the test results to catch the suspect.However, Wang Ran was not entirely convinced of his discovery and called Cao Yang for help.Cao Yang suggested that Tao Weizhi take the collected samples to the provincial capital for re-examination.After another test by Cao Yang, the results were consistent with Wang Ran's, confirming that the suspect was indeed in the Gu family.Subsequently, Wang Ran conducted an investigation on the men of suitable age in the Gu family, but no suspects were found.Since then, Tao Weizhi has become extremely enthusiastic about DNA testing.

When Qin Chuan and his party arrived in Donglin County, Fang Wen, Yang Wei and others had been waiting for a long time.Qin Chuan was eager to see Tao Weizhi, so Yang Wei contacted him, and Tao Weizhi promised to return after getting what he wanted.Qin Chuan asked Cao Yang to notify Wang Ran to come.Early the next morning, Qin Chuan and his party arrived at the crime scene, and Cao Yang showed Qin Chuan one by one the evidence left at the scene.Qin Chuan noticed that there were five beverage bottles at the scene, three of which contained tadpoles, but the other two were not tested.Qinchuan sent Cheng Shufeng to the victim's home to find out how many bottles the girls had taken.

By asking the police who were present at the scene, Cheng Shufeng learned that the three girls brought four drink bottles.The investigators only inspected the bottle body after the incident, but not the mouth of the bottle.All evidence is stored at the County Public Security Bureau.Qinchuan then sent Su Chang and Cao Yang to re-test all the evidence overnight.At the same time, Qinchuan also learned that the surveillance video captured a man entering and exiting the ditch to catch tadpoles. However, due to the large number of people at the time and the unclear surveillance, the police did not pursue the investigation in depth.Yang Wei and Cheng Shufeng complained privately and believed that there was no need for another DNA test.

Qin Chuan and Fang Wen came to the small shop in the village. This shop has a history of seven or eight years and has been equipped with surveillance cameras from the beginning.One month after the incident, investigators came here to investigate, but the images had been covered.Qin Chuan was disappointed and believed that important evidence had been lost.Fang Wen admitted that he had been negligent during the investigation.

Yan Jun handed all the evidence to Su Chang and Cao Yang for review. They found that the suspect's DNA was left on the mouth of one of the beverage bottles.Su Chang immediately reported to Qinchuan.Qinchuan then discussed with Liu Lin and Wang Ran to establish a big data system to better utilize new technologies.

Tao Weizhi hurried to Qinchuan, looking haggard. He was eager to report to Qinchuan.Qin Chuan asked him to eat first. After Tao Weizhi ate quickly, he couldn't wait to report the progress of the case.Six years ago, Wang Ran ruled out the Gu family as a suspect, which confused Tao Weizhi.Yang Wei and Cheng Shufeng persuaded him to give up, but Tao Weizhi was unwilling and took them to the provincial capital to ask Su Chang and Cao Yang to test again.After re-testing, it was confirmed that the DNA of the Gu family was related to the suspect, but there were so many members in the Gu family that it was impossible to find out.Su Chang, Cao Yang and Lei Xiujun persuaded Tao Weizhi to give up, but he was determined to get to the bottom of it because the innocent murder of three girls drove their mother into madness.

Tao Weizhi learned that Gu Bingyin, the oldest living person in the Gu family, lived in Shucheng, Yuhe County, so he took Yang Wei and Cheng Shufeng there.The vehicle broke down along the way and the two wanted to retreat, but with Tao Weizhi's encouragement, they continued on.Tao Weizhi asked Gu Bingyin in detail about the ancestors of the Gu family and their descendants.

For six years, Tao Weizhi has been almost obsessed with investigating the case.Once, when he passed by Donglin Dumpling Restaurant, he stopped to have a meal and took the opportunity to extract the owner's DNA.

Technicians used DNA technology to identify the suspect as a member of the Gu family, and Tao Weizhi embarked on a long investigative journey.For six years, he traveled all over the country, just to track down the Gu family. He was almost obsessed. Whenever he heard any information related to Donglin or the Gu family, he would delve into it in depth.Although Yang Wei and Cheng Shufeng persuaded him to give up many times, Tao Weizhi remained persistent, and they had no choice but to accompany him around.

By chance, Tao Weizhi learned that Gu Wanli's descendants were in Shucheng, and immediately went there with Yang Wei and Cheng Shufeng.In the Qing Dynasty Legal History of Shucheng Library, they found clues that Gu Wanli fled to Shucheng from Huai County, Hedong City.Tao Weizhi came up with a plan and decided to go to Huai County to explore the descendants of other branches of the Gu family.He quickly contacted Su Chang and Cao Yang for help, but was dissuaded, saying that this was tantamount to finding a needle in a haystack and was costly.But Tao Weizhi was determined and vowed to seek justice for the parents of the deceased, otherwise he would not be able to feel at ease.He consulted historical materials and learned that there was a village called Gujiapo in Huai County, so he decided to go and explore it.

Although Yang Wei and Cheng Shufeng had no choice but to follow Tao Weizhi to Huai County.However, there is no Gu Jiapo in Huai County, and Tao Weizhi searched the county annals and found nothing.Unwilling to give up, he rode his bicycle alone to ask around.Huai County is mountainous and the villages are scattered, so he had no choice but to climb over the mountains and ridges. After many hardships, he finally found Gujiapo, which was hidden deep in the mountains.However, when Wang Ran and his colleagues came with testing equipment to conduct DNA tests on men of appropriate age, the results found no matches.Tao Weizhi's hope was once again frustrated. He screened out all the men of the right age named Gu in Huai County, and there were more than 14,000 of them.

Tao Weizhi was disheartened and prepared to leave Huai County.However, the night before leaving, he accidentally saw someone online claiming to have moved from Gujiapo to Pingcheng.Tao Weizhi immediately rushed to Pingcheng as if he had found a treasure, and unexpectedly obtained the Gu family genealogy.After he handed over the genealogy to Qin Chuan, Qin Chuan praised his persistence and advised him to go back and rest.

The next day, Qinchuan held a case analysis meeting and believed that the suspect was a local.Although Tao Weizhi had different opinions, Qin Chuan's analysis was very clear, so he had to remain silent.Tao Weizhi was depressed and drank alone to relieve his sorrow.Seeing this, Yang Wei and Cheng Shufeng also came to him to complain.Qin Chuan guessed Tao Weizhi's dissatisfaction, so he hosted a banquet for them and invited Sun Chang, Cao Yang and Liu Lin to accompany them.During the dinner, Qin Chuan comforted Tao Weizhi with his own experience. Tao Weizhi finally let go and promised to follow Qin Chuan's arrangements.

Qin Chuan frankly shared with Tao Weizhi the twists and turns of the Qingjiang explosion case, and comforted him not to lose confidence.Adjusting your strategy and going all out is key, he stressed.After reflecting on the setbacks of the past six years, Tao Weizhi finally understood Qin Chuan's intentions and solemnly promised to go all out to track down the truth.

As a veteran criminal policeman with 30 years of police experience, Qin Chuan has handled countless vicious cases, but the Donglin murder case still remains fresh in his memory.He led the team to Liangcheng to conduct an in-depth investigation into the serial murder case that shocked the city twenty-eight years ago.This case involved eleven female victims, ranging in age from eight to 29 years old, and the criminal methods were extremely cruel.Since the incident, the heavily industrial city has been cast in a shadow.

At the Liangcheng Public Security Bureau, Qin Chuan quickly organized a case analysis meeting.Facing the silent local investigators, he asked Deputy Director Hai Qingyi to speak by name.Hai Qingyi talked about the tremendous efforts made by the police to solve the case over the past 28 years and the heavy pressure the case brought to the police and the public.Although expert teams arrived one after another, they were unable to find a breakthrough, and the case seemed to have become an unsolvable mystery.

Song Xu, deputy captain of the criminal investigation detachment, expressed doubts about re-investigating the case, believing that it would only reveal the scars of the police officers.He mentioned that some police officers died or fell ill while investigating the case, and some were even driven crazy.However, Qin Chuan was determined. He showed the case notes compiled by Wu Yingde and discovered a key figure - retired veteran policeman Fan Shouliang.

In the nursing home, although Fan Shouliang suffered from Alzheimer's disease, he still couldn't forget the serial murder case.He was sometimes sober and sometimes confused, but he could always draw a sketch of the crime scene on the ground.With Song Xu's comfort, he told Qin Chuan and others about his investigation experience that year.From the first case in 1988 to the last clue in 2001, Fan Shouliang and his colleagues experienced countless failures and despair, but he never gave up his determination to track down the murderer.

Qin Chuan and others were deeply moved, and they promised to investigate the case at all costs.Song Xu also vowed to go all out to cooperate with Qin Chuan's work.In a moment of clarity, Fan Shouliang handed Qin Chuan a heavy file bag, which contained evidence and information he had collected over decades.

‌Rewritten version 2‌:

Qin Chuan frankly told Tao Weizhi about his tortuous experience in the Qingjiang explosion case and encouraged Tao Weizhi not to be discouraged.He suggested changing his thinking and intensifying his work. After reflecting on past setbacks, Tao Weizhi deeply understood Qin Chuan's good intentions and vowed to go all out to advance the investigation of the case.

As a senior criminal policeman, Qin Chuan has handled numerous vicious cases in his thirty-year career, but the Donglin murder case is still a lingering shadow in his heart.He led the team to Liangcheng and began to investigate the serial murder case that shocked society twenty-eight years ago.This case involved multiple young female victims, and the cruelty of the crime was appalling.

At the Liangcheng Public Security Bureau, Qin Chuan quickly organized a case analysis meeting. Facing the silent investigators, he asked Deputy Director Hai Qingyi to speak by name.Hai Qingyi reluctantly spoke of the police's hard work over the years and the tremendous psychological pressure the case had put on police officers and the masses.Despite the huge efforts of the police, the case has never been able to make a breakthrough, which has become a huge stone in the hearts of the police officers.

Song Xu, deputy captain of the Criminal Investigation Detachment, has reservations about re-investigating the case, believing that it will only cause the police officers to suffer again.However, Qin Chuan's determination did not waver.He showed the case notes compiled by Wu Yingde and discovered the key clue - retired veteran policeman Fan Shouliang.

In the nursing home, although Fan Shouliang suffered from Alzheimer's disease, he still couldn't forget the serial murder case.Under Song Xu's comfort, he told Qin Chuan and others intermittently about his investigation experience that year.From the occurrence of the first case to the interruption of the final clues, Fan Shouliang and his colleagues experienced countless failures and despair, but they never gave up their pursuit of the truth.

Qin Chuan and others were deeply touched, and they promised to go all out to investigate the case.Song Xu also expressed that he would fully cooperate with Qin Chuan's work.In a moment of clarity, Fan Shouliang handed Qin Chuan a file bag full of evidence and information, hoping that he could find out the truth and seek justice for the victims.

Song Xu led Qin Chuan and his team to the scene of the first serial murder - the junction of urban and rural areas.Twenty-eight years have passed and the old house no longer exists, only ruins remain.Later, the group moved to the dormitory of the Power Supply Bureau, where two murders had occurred. Although the building still existed, the residents had long since disappeared.

Qin Chuan keenly discovered that the nine murder cases were all arranged along the main road.He speculated that the murderer was unfamiliar with the terrain of Liangcheng and preferred to commit murder around 10 a.m. and 1 p.m.In addition to the nearby long-distance bus station, Qin Chuan concluded that the murderer might come from the surrounding suburban counties, while Song Xu speculated that Guanhe, 60 kilometers away, was most likely.

Qin Chuan captured the key clue from the victim's statement: the murderer always wore a pair of popular semi-high-heeled leather shoes.Song Xu and Fan Shouliang visited Liangcheng Shoe Factory but found nothing.Although some experts concluded through DNA that the murderer was from Tonghai, the police could not find any clues among the many Tonghai businessmen in Liangcheng.

Qin Chuan firmly believes that the murderer is in or around Liangcheng.He asked Song Xu to lead the way to the place where the final crime occurred. After hearing the news, the victim's mother came over and begged Qin Chuan with tears to avenge her daughter.Qin Chuan was well aware of the difficulty of reopening old cases, as the scene was annihilated and clues were scarce, but he decided to start with the details, sending Su Chang and Cao Yang to review the inspection materials, and invited Tongcheng trace expert Nie Chengyi to help, and Lei Xiuping accompanied him to visit the shoe factory.In addition, he also invited Cao Zhongshu to participate in the grand event.

Although the shoe factory has closed down, Song Xu managed to contact Master Xia.With the help of Lao Xia, they found shoes that matched the shoe prints at the scene.Nie Chengyi analyzed that the murderer would store the shoes after each crime.Lao Xia recalled that a large number of these shoes were sold to Guanhe, so Qin Chuan decided to focus on investigating this area.

Su Chang and Cao Yang worked day and night to test the samples, and Cao Yang successfully expanded the DNA database.Qinchuan convened a task force to deploy investigation tasks.Cao Zhongshu proposed using new technologies to build a fingerprint database to deal with the problem of fingerprints changing over time.Qin Chuan adopted this suggestion.

At the same time, Tang Yixun was investigating three murder cases in Caohe District, Zhucheng City.The three cases were all targeted at young women. The crimes were committed between 7 and 9 pm in remote locations and close to highways. Mobile phones and cash were robbed.The police checked the mobile phone to no avail, so Tang Yixun asked Qin Chuan for help.Qin Chuan suggested careful testing of the items left at the scene and shared similar cases that Cao Yang encountered while studying abroad.After Qin Chuan arranged his work, he immediately returned to the provincial capital.

Qin Chuan visited Wu Yingde and reported to him the progress of the case.Wu Yingde encouraged Qin Chuan and asked him to organize his investigation notes and information.Qin Chuan readily agreed and applied to Director Yuan Zhen to establish a database, and received full support.

Three months later, Su Chang and Cao Yang received good news. They found the DNA of the same man on the victim Lin Ling and at the crime scene.Qinchuan has established databases in Zhucheng and Lingzhou, and assigned Tang Yixun to be fully responsible for the comparison work.With the assistance of Ou Jiaming and others, the police successfully identified Li Li as a suspect and immediately arrested him.

Ou Jiaming launched an emergency interrogation of Li Li late at night. He showed photos of the three victims and tried to get Li Li to identify them.However, Li Li firmly denied the crime and avoided answering all questions.Qin Chuan knew that the time span of this case was too long, and the suspect might have become paralyzed. He also expected that the police had no conclusive evidence, so the road to interrogation would be difficult.He couldn't help but feel worried for Ou Jiaming and his team.

After the interrogation, it was already late at night, and Qin Chuan and Liu Lin were about to go home when they suddenly received a call from Su Chang.After careful DNA comparison, Cao Yang found that the DNA of Mu Xinsheng and his nephew from Group 9 of Xiguan Village matched the DNA of the suspect, but this clue was quickly eliminated.Cao Yang was convinced that it was someone from the Mu family, so Qin Chuan immediately took Liu Lin to the evidence center and reported the situation to the Donglin police overnight.

Fang Wen arrived at the Public Security Bureau in the early morning. The emergency meeting was ready. Tao Weizhi, Yang Wei and others had been waiting for a long time.They traveled all over the country for six years but found nothing, but Qinchuan's team made a breakthrough in a short period of time.Tao Weizhi personally led a team to collect DNA samples from all the males of the Mu family, but after comparison by the technology center, none of them matched.

Tao Weizhi's newly ignited hope was shattered again, and he was extremely upset.Fang Wen suggested that they track down Mu Chunguang, who has been dead for more than 20 years.Tao Weizhi learned that Mu Chunguang's niece lived in Qu County, Hedong City, so he hurried there with Yang Wei and Cheng Shufeng.However, the niece didn't know much about Mu Chunguang. She only remembered that his original surname was Ji, who was adopted by his mother into the Mu family after she remarried.Mu Chunguang's father is Ji Sanpo, a native of Dongjing Village, Chengguan Town, Donglin.

Tao Weizhi and his party rushed to Chengguan Town non-stop, but the vehicle suddenly broke down on the way.They had to walk and later took a tricycle to Dongjing Village.Yang Wei and Cheng Shufeng complained repeatedly, but Tao Weizhi encouraged them to maintain confidence and firmly believed that the real murderer could be found.However, Yang Wei and Cheng Shufeng did not have high hopes for this.

After going through all kinds of hardships, they finally arrived in Dongjing Village and went straight to the village committee.The village director was away, so Tao Weizhi asked the old man sunbathing at the door for news about Ji Sanpo.The uncle has lived in the village for more than eighty years, but has never heard of this person.So Tao Weizhi, Yang Wei and Cheng Shufeng separately inquired in the village, but found nothing.Tao Weizhi was unwilling to give up and asked from door to door, but still no one knew Ji Sanpo.He vowed to dig deep to find the suspect.

At the same time, Guo Jiaqi stayed in Qingjiang to cooperate with the local police in collecting fingerprints, but the workload was huge and the police officers were short of manpower.He asked Qin Chuan for help, and Qin Chuan suggested that he mobilize the staff of the street and neighborhood committees to assist.Guo Jiaqi sent someone to guide them in collecting fingerprints correctly, and Long Siming, director of the Zhenxing Police Station, learned very seriously.When Long Siming came home from get off work, Lao Zhang, who worked in the detention center, told him that a new prisoner had been detained and he asked Lao Zhang to help collect fingerprints.

Qin Chuan summoned Su Chang, Cao Yang and Liu Lin to hold a video conference to discuss the case with Tao Weizhi and others.Tao Weizhi reported in detail the progress of fingerprint collection. Just when everyone was in trouble, the village party secretary revealed an important information: the current Dongjing Village is actually divided into Dongjing Upper Village and Dongjing Lower Village.Tao Weizhi and others immediately went to Dongjingxia Village to search for village records, and found many people named Ji from the merit monuments in Taoist temples.The village party secretary took them to find the oldest old man in the village. The old man once helped compile the village records, but now he is unconscious.After Tao Weizhi's patient questioning, the old man finally remembered something about Ji Sanpo and Mu Chunguang.However, Yang Wei and Cheng Shufeng expressed doubts about this.

In Dongjingxia Village, Tao Weizhi, Yang Wei and Cheng Shufeng were working intensively on the investigation.A simple shack at the entrance of the village caught their attention, with a large stone trough placed next to it.Tao Weizhi quickly recorded the scene on his mobile phone and immediately informed Qin Chuan, who sent Liu Lin, Su Chang and Cao Yang to support.They began to compare the males of the right age in the Upper Village and Higashino Village in Tokyo one by one.

At the same time, Yang Xiaojie, an auxiliary police officer at the Technical Center of the Nanwen Branch of the Zhucheng City Public Security Bureau, finally found key clues in the samples sent from Jiangtai Detention Center through unremitting efforts.The suspect turned out to be Du Kun, deputy director of the Qingjiang City Shantytown Renovation Office, who had just been detained on suspicion of job-related crimes.Guo Jiaqi quickly reported the news to Qin Chuan, who immediately informed Yuan Zhen.Qin Chuan knew that Du Kun would not give in easily and decided to go to Qingjiang in person.Yuan Zhen offered to go with Qin Chuan to cheer him up.

After Gu Wenlong learned the news, he immediately informed Yang Xiong.After hearing this, Yang Xiong was surprised and happy, and hugged Gu Wenlong and cried.The pressure of eighteen years was finally released at this moment.Qin Chuan paid a special visit to Yang Xiaojie, thanked her in person, offered her a bonus of 50,000 yuan, and invited her to dinner.But Yang Xiaojie firmly rejected the bonus, saying that it was the result of the joint efforts of her and her colleagues.She was in a hurry to pick up her daughter, and Qin Chuan no longer forced her.

Yang Xiaojie went to pick up her daughter with joy. This was the first time she arrived on time.Her daughter was smiling from ear to ear, and Yang Xiaojie was also very pleased because she had successfully targeted a criminal with a long history of crimes.On the other side, Yang Xiong, Gu Wenlong and Jin Minghai interrogated Du Kun, while Qin Chuan and Liu Lin watched the entire process via video.Du Kun had an arrogant attitude, refused to plead guilty, and even threatened to sue the interrogators.Qin Chuan had already predicted this and asked Yang Xiong to ignore Du Kun for a few days before looking for other evidence.

Liu Lin rushed to Donglin County urgently to assist in the investigation.Tao Weizhi and Fang Wen learned that the two cases in Qingjiang had been successfully compared, and their pressure doubled.The provincial department sent five experts and test kits, and they stood guard outside the laboratory door and never left.After unremitting efforts by technicians, it was finally discovered that the DNA of four people in Dongjingxia Village matched the samples, and these four people were Wang Hai's family.

Tao Weizhi and others quickly rushed to the Wang family and entered the house on the pretext of checking the electric meter. They confirmed that all four members of the Wang family were present.Later, they took Wang Hai's family to the technical center on the grounds of physical examination.Cao Yang and Su Chang compared the DNA of the four people and finally identified Wang Hai as the suspect.The investigators were so excited that they rushed to tell each other.

Tao Weizhi, Yang Wei and Cheng Shufeng were so excited that they could not speak. Tao Weizhi even broke down and burst into tears.Wang Hai confessed his crime and admitted to killing three girls who were catching tadpoles.He was idle when he accidentally saw the three girls, threatened them with a toy gun, and then raped and killed them one by one.After Wang Hai told his family about the incident, his brother-in-law advised him to go out and escape.He called his father for help, but his father scolded him and asked him to hide in Lingzhou.Wang Hai was arrested as soon as he returned home after hiding for a year.Wang Hai's father cried bitterly and admitted his mistake.The Donglin murder case was finally solved, and Tao Weizhi and others could finally rest in peace.However, Tao Weizhi was exhausted physically and mentally from being overly involved in the case. He felt that he was no longer suitable to be a criminal police officer, so he voluntarily resigned to find his own path.

On the other side, Ou Jiaming continued to interrogate Li Li.Li Li refused to plead guilty and spoke plausibly.The police showed the video evidence of his father and sister. Li Li lost control and shouted to stop playing.When he saw his sister's video, he was even more ashamed and shouted stop.Ou Jiaming took the opportunity to persuade Li Li, and Li Li's psychological defense finally collapsed.He knew he could not escape the punishment of the law, so he confessed his crime of killing three girls.

Li Li knew that he could not escape his guilt, but he still had the desire to live, hoping to compensate the families of the three victims by working on the construction site.However, Ou Jiaming advised him to face up to his crime first and wait for the legal verdict.

On the other side, Yang Xiong discovered during the investigation that Du Kun and Qi Huansheng were old acquaintances.In 1997, Du Kun opened a dance hall, but he firmly denied knowing Qi Huansheng and even denied killing him.Du Kun admitted that after his business failed, he asked Qiu Zhiguo for help with a loan and was asked to help move items, but he did not want to talk more about the matter.Yang Xiong was deeply anxious about this, so he turned to Qin Chuan, hoping that Qin Chuan could ask Ye Haiping and others to help conduct a psychological test on Du Kun.Ye Haiping reported the matter to Gao Xiaoying, who readily agreed and sent Ye Haiping and Yao Jie to Qingjiang with equipment.

Gao Xiaoying, Guo Xin and Ye Haiping quickly arrived in Qingjiang, and Qin Chuan asked them to try to find out the whereabouts of the guns.Yang Xiong couldn't wait to take out the collected fingerprint evidence.Gao Xiaoying decided to conduct an on-site investigation first, while Qin Chuan arranged for Yang Xiong to fully cooperate.Du Kun finally agreed to undergo a psychological test, and Ye Haiping and Yao Jie began to operate the equipment, while Qin Chuan and Gao Xiaoying watched closely.

While chatting with Du Kun, Ye Haiping thoughtfully provided him with warm pads to warm his hands.After Yao Jie connected the test equipment to Du Kun, Du Kun behaved calmly and responded to Ye Haiping's questions fluently.However, Ye Haiping keenly caught the tiny movements of his feet digging into the ground, so he decided to cancel the first set of test questions and continue testing Du Kun.Qin Chuan and Gao Xiaoying both noticed that Du Kun was trying his best to hide his nervousness.

Ye Haiping deliberately showed the test results to Du Kun. Du Kun suddenly panicked after seeing his emotional change curve.Ye Haiping took advantage of the situation to pursue, revealing the locations where Du Kun hid his guns one by one, and pressed forward step by step.In the end, Du Kun's psychological defense completely collapsed. He admitted that he and Pang Deping had joined forces to kill Qi Huansheng and Qiu Zhiguo's family of four, and revealed the fact that he discarded the gun in Qingshu River.The truth of the case has now been revealed, and Qin Chuan is impressed by Ye Haiping's abilities.

Du Kun confessed all his crimes.He originally ran an ice cream processing factory, but the cold weather caused the business to fail.Unwilling to be reconciled, he found Pang Deping and planned to rob the bank's cash transport truck.In order to obtain guns, they found out Qi Huansheng's whereabouts in advance and killed him.However, after the incident, the bank tightened security measures, and Du Kun decided to rob the gold store instead.After inadvertently seeing Qiu Zhiguo's glorious life, they followed and killed four members of Qiu Zhiguo's family, but in the end they only got 2,000 yuan.

After hiding for a year, Du Kun drove for the leaders in the development zone through his connections. He was promoted by pleasing the leaders and eventually became the deputy director of the development zone.However, he was still unwilling to face his crime, thinking that he could get away with it after eighteen years had passed.But in the psychological test, his psychological defense completely collapsed.

The police officers took Du Kun to Qingshu River, and he pointed out the location where the gun was discarded.However, a confession alone is not enough to convict him, and the gun must be found to convict him.Qin Chuan ordered Yang Xiong to mobilize all police forces to search for guns in the river, and they launched a blanket search.After a week of careful searching, still nothing was found.At this time, it began to rain heavily, and it continued to rain for several days.Qinchuan urgently borrowed a metal detector from the Provincial Military Region.

The rain was getting heavier and the reservoir was about to overflow, forcing the search to be stopped.Qin Chuan was so anxious that he came to the scene to give instructions in the rain.The policemen searched the river with detectors and finally found the key gun.The police officers cheered to celebrate this important discovery.

Yang Xiaojie successfully compared the DNA of the suspects in the two Qingjiang cases. For this reason, the director of the Nanwen Branch of the Zhucheng City Public Security Bureau specially rewarded her with a bonus of 50,000 yuan as an encouragement and called on all police officers to learn from Yang Xiaojie.

As two cases in Qingjiang, the Donglin homicide case and the Caohe case, were solved one after another, Qinchuan has yet to receive the DNA testing data provided by Liangcheng police.He was so worried that he immediately sent someone to call the Liangcheng police to inquire about the situation.After unremitting efforts, police officers from the Liangcheng Technology Center finally found clues in the fingerprints collected by Guan He, successfully compared the suspect's fingerprints, and identified Chang Xiaobing and several people from the Chang family.After learning the news, Zhu Zhipeng, deputy director of the Liangcheng Public Security Bureau, immediately mobilized all police forces to find these people and planned to bring them back for comparison one by one.

At the same time, Song Xu suddenly received news of Fan Shouliang's cerebral hemorrhage, and he immediately drove to the hospital.On the other side, police officer Feng Lei led the technical center officers to find Chang Xiaobing's uncle, Chang Xingrong, and collected his fingerprints on the spot under the pretext of applying for a second-generation ID card.The police officers stared at these fingerprints day and night, and finally identified Chang Xingrong as the murderer from the fingerprints.After receiving the news, Feng Lei immediately kept an eye on Chang Xingrong and sent the collected fingerprints to colleagues at the center for confirmation.After careful comparison, colleagues determined that Chang Xingrong was the murderer.

After Song Xu learned of this, he immediately led the police to arrest Chang Xingrong and bring him to justice.Facing Song Xu's anger, Chang Xingrong acted innocent.However, under Song Xu's severe questioning, Chang Xingrong was finally frightened by his momentum and admitted that he was the murderer of the eleven serial murders that shocked society, and regretted that he had implicated his two sons.Chang Xingrong confessed all his crimes. His criminal behavior was so heinous that the investigators hated him.When confessing the crime, Chang Xingrong also revealed that he had felt scared when he killed the nurse and the eight-year-old girl.

On the other side, Fan Shouliang's condition became more and more critical. He was lying on the hospital bed with tubes inserted all over his body and his life was in danger.Qin Chuan and Song Xu felt mixed emotions in their hearts when they saw him like this through the glass.At this time, reporters from the Public Security News also came to the hospital, preparing to report on the Chang Xingrong serial murder case.Facing the reporter's camera, Chang Xingrong did not feel any guilt for the deceased and his family. Instead, he kept asking whether the matter would affect his two sons.Chang Xingrong claimed that he had passed the pilot exam when he graduated from high school, but was later replaced.However, after investigation, Liu Lin found that Chang Xingrong had only passed the preliminary examination and there was no one to replace him.Qin Chuan knew that Chang Xingrong cared about his son, so he reminded him to give up as soon as possible, because his son and future generations would be ashamed of him.

After the case was solved, Qin Chuan and Liu Lin returned to the provincial capital together.Along the way, Qin Chuan was worried. Although the long-standing case was finally solved, his mood became heavier and heavier.At this time, Song Xu called and reported the death of Fan Shouliang.After hearing the news, both Qin Chuan and Liu Lin couldn't help but burst into tears.Afterwards, Song Xu came to pay homage to Fan Shouliang's tomb and couldn't help singing the theme song of “Plainclothes Police”.Now that the serial murder case has been solved, Fan Shouliang can finally rest in peace.

Back home, Qin Chuan had dinner with his family.At the dinner table, He Qinglian was smiling and talking and laughing with Qin Chuan.Soon, Qin Haizheng also rushed home. He told his family that he was about to work in the anti-fraud center.Qin Chuan expressed support for this.At the same time, Ye Haiping also called to announce the good news. She had won the China Youth Science and Technology Award and would go to Xucheng to receive the award next month.Qin Chuan wanted to accompany her, and Ye Haiping naturally agreed happily and prayed that no major case would occur by then.

After the meal, He Qinglian urged Li Wen and Zhao Fei to get married as soon as possible, but Li Wen made random excuses to deal with it.Ye Haiping felt that Li Wen and Zhao Fei were a good match, but Li Wen did not allow her to mix in blindly.Qin Chuan teased Qin Haizheng from the side and asked him to bring his girlfriend back to see him.However, Qin Haizheng said that he does not have a girlfriend yet.When Qin Chuan saw this, he had to admit that he was deceiving Qin Haizheng.

The day to receive the award finally arrived, and Qin Chuan and Li Wen came to the scene to cheer for Ye Haiping.Ye Haiping seemed to see her father Ye Maosheng coming to the scene to congratulate her, and she was so excited that tears filled her eyes.After the award ceremony, Niu Yuguo's daughter Niu Jing came to Ye Haiping, hoping that she could go to the hospital to see Niu Yuguo.Niu Yuguo has been suffering from cancer for a long time and will soon die now.However, Li Wen firmly disagreed with Ye Haiping's departure.Niu Jing told Ye Haiping that Niu Yuguo had been feeling guilty because of what happened back then and wanted to apologize to her.She hoped that Ye Haiping could go to see Niu Yuguo so that he could leave with peace of mind.Ye Haiping agreed to Niu Jing's request after careful consideration.Qin Chuan sent her to the hospital.However, when they arrived at the hospital, Niu Yuguo had already suffocated because he took off his breathing mask.After hearing the news, medical staff rushed to rescue him, but Ye Haiping left the hospital silently.After returning to the car, she covered her face and burst into tears.She felt mixed emotions when she saw her father's murderer being punished in this way.

At this time, Qin Chuan stood there, thinking of those comrades and colleagues who had passed away - Gao Jianshe, Ye Maosheng, Fan Shouliang and others.He couldn't help but sing the %plainclothes police theme song to pay homage to the fallen heroes.The song echoed in the night sky and spread far and wide...