Chen Qidi did not have a single wound on her face and head, Liu Dayu found a little abrasion at the base of her right palm, and a long strip of skin was scratched on the wound, about 0.3 millimeters wide and about one centimeter long. The floor tiles in the bathroom are 1.5 centimeters by 1.5 centimeters of mosaics, and the abrasions on Chen Qidi's palms should be caused by the sharper corners of the mosaics. This shows that Chen Qidi has also struggled slightly.

Han Lingling unzipped her red leather jacket, and inside the leather jacket was a goose yellow turtleneck.

Han Lingling flipped over her collar, and everyone saw that there were two very obvious pinch marks one centimeter below Chen Qidi's throat, and the pinch marks were purple because of bruising.

Yan Jianhua touched Chen Qidi's neck, and there was still a little temperature on his neck.

Chen Qidi's death time was a little later than the death time of his sister Chen Qiming, and the specific time was about five o'clock.

The information provided by Chen Qidi's homeroom teacher, Mr. Huo, also confirmed the comrades' judgment on the time of Chen Qidi's death: after school, Mr. Huo told his classmates something about the end of the time.

Mr. Huo also provided a more important situation: living on the same floor with Chen Qidi. There are two students in the same unit, a boy named Shi Wenjie and a girl named Dong Xiaoqian, and they and Chen Qidi often go to and from school. Therefore, if you want to know the exact time when Chen Qidi returned home, you can ask them for information. Dong Xiaoqian also often goes to Chen Qidi's house to write homework, because Teacher Ma and Teacher Liu are warm and often tutor the children in their homework, so Dong Xiaoqian may know who has been in contact with Teacher Ma's family in recent times.

Ouyang Ping wrote down the names of Shi Wenjie and Dong Xiaoqian in his notebook. Ouyang Ping has already thought about it, it is difficult to say about Teacher Ma's physical condition, if Teacher Ma's physical condition does not allow it, the information provided by these two children will be an indispensable content.

After inspecting the scene, inspecting the corpses, and disposing of the corpses, Ouyang Ping and his comrades-in-arms immediately engaged in an intense investigation visit.

Time is fleeting, and the investigation is in full swing. The two policemen of the Duolun Road Police Station and the slag director of the Xiaojie Neighborhood Committee provided great convenience for the comrades' investigation and visit.

Ouyang Pingbing is divided into three ways:

On the first road, Liu Dayu, Liu Wenbin and policeman Wang Dequan were responsible for finding the owner of the shop to investigate and visit.

The author would like to add here by the way: behind Building 5 is Building 6, and there are seven or eight shops below Building 6, some of which make breakfast, some sell roasted food, some sell fruits, and some sell noodles and barber shops; Earlier, the author once explained that next door is the big vegetable market, there is a small door between Building 5 and Building 6, this small door leads to the vegetable market, and there are many people entering and exiting the vegetable market from this door, so over time, the house under Building 6 has become a façade house.

At the time of the incident, it was raining, there were relatively few people entering and leaving the vegetable market, and the business in the shops was relatively light, so it is possible that the owners of these shops were aware of the situation of people entering and leaving Unit 3 of Building 5.

On the second road, there are Ouyang Ping, Han Lingling and Li Wenhua, plus the policeman Zhang Zifeng, who is in charge of Teacher Ma. In the process of the comrades' investigation of the scene and the autopsy, Mr. Ma had already been sent to the nearby 414 Hospital by Duan Dawei and others. This was decided by Ouyang Ping and Chen Hongxiang after discussion between the husband and wife. Ouyang Ping also asked police officer Zhang Zifeng to contact two cardiologists from 414 Hospital as Mr. Ma's attending physician.