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.