On 12 January 1996, a vicious homicide case occurred in Room 206, Building 5, Xinyuan Village, Duolun Road Street, Xiaguan District, Jingnan City. The next morning, the shocking news was reported in the major newspapers.

Looking at Ouyang Ping's autopsy records and on-site investigation records, everyone knows why this case caused such a big sensation.

Before looking at the autopsy report and the on-site investigation records, it is necessary to describe the general circumstances of the case:

In this vicious homicide case, a total of three people were killed: 67-year-old teacher Liu Xiaoyu (retired); Mr. Liu's eldest niece, 12-year-old Chen Qiming; Teacher Liu's little niece is ten-year-old Chen Qidi.

On the evening of January 12, 1996 -- At around 5:50, Ms. Liu's daughter Ma Wenjing went home (she came to visit her parents and two children. Ma Wenjing and her husband Chen Hongxiang just returned from Australia a year ago, the couple is setting up a software company, and they have no time to take care of their two children for the time being, so they handed over the two children to their parents to take care of, and applied for school registration in a nearby primary school - the school is the district center primary school), she opened the security door, walked into the master bedroom (parents' bedroom), and found a person lying on the bed, she slowly walked to her, her mother was facing inward, and seemed to be sleeping very deeply - Ma Wenjing had a bad premonition, whether her mother was sick - Because at this time, it is impossible for my mother to lie in bed and sleep, and the two nieces are going home from school. Ma Wenjing shouted, her mother did not respond, she patted her mother's left shoulder with her hand again, but her mother still did not respond, Ma Wenjing slowly lifted the quilt, this lift, Ma Wenjing was frightened, there was a rope in her mother's collar - her mother's face was pale.

Ma Wenjing, who had lived abroad, immediately realized that the scene must not be destroyed, so she quickly exited the security door, then dialed the police, and then dialed her husband's phone.

Ma Wenjing didn't have time to think about it at the time, her initial hunch did not include the two daughters, so he did not open the other doors (Mr. Ma's house has a total of three rooms, the old couple sleeps in the master bedroom, and the two nieces each have a room) - in fact, he should be able to think of it. The school ends at around 5 p.m., and the two children should be back home (usually, at this time, the two children are already sitting in the cafeteria for dinner).

After making the call, Ma Wenjing thought of her two daughters. She wanted to rush into the room to have a look, but she was afraid that she would destroy the scene and bring unnecessary trouble to the police investigation, so she ran to ask the neighbor on the other side of the door if she had seen her two daughters come home, and the neighbor on the other side of the door was surnamed Hao, an old couple, because it was cold, they stayed in the house and did not come out, so I don't know if Qiming and Qidi came back, and asked them if they heard any movement, and they didn't hear it - they couldn't hear it either, because outside the wall of this building was a vegetable market, around five o'clock, When there are people in the vegetable field, there is the noise and noise of the vegetable field, and it is impossible to hear ordinary sounds.