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...