Li Xuemei, who had long since died, had her eyes open, her face was swollen and purple, and she had a long, deep wound on her forehead and a wound on her jaw.

The autopsy report indicated that Ms. Li had severe blunt force trauma to her head as a result of the blow to the table, which had fallen to the ground, an abandoned television table with wheels. She had two stockings tied around her neck, she had been strangled and had lost her breath when her head was immersed in the bucket.

Yan Xinyi flipped out the photos of the autopsy at the crime scene, looked at them intently for a few minutes, and then asked a few questions that she wanted to figure out, and then began her analysis:

Li Xuemei's body was found with her head immersed in a plastic bucket filled with water. I have studied many authoritative books such as "Criminal Psychology" and a large number of cases at home and abroad, if the body is finally placed in a place with water indoors, such as a bathtub, shower, container, etc., the main purpose is to 'arrange' the crime scene.

Now that you've interviewed everyone you can find, you've investigated all possible leads. I think you've already talked to the murderer, who lived near Li Xuemei's house at the time, and even in the neighborhood. This kind of crime is almost always the work of a neighbor or family member, and no one will come all the way to commit the crime.

Li Xuemei was severely wounded to her head and bled profusely, and I am almost certain that the killer had blood on his body, but he was able to find a place nearby to clean it and dispose of his bloody clothes. This shows that the murderer we are looking for seems to be calm when committing the crime, because he is very familiar with Li Xuemei, or has observed her for a long time, has mastered her habits, and knows that no one will disturb him. ”

"The murderer in this case, who went to Li Xuemei's house that night, did not premeditate to kill her, and the murder was a later thought. If he had planned it beforehand, he would have brought a murder weapon or tool with him. But on the contrary, we see strangulation with hands and blunt blows, which shows that the killer killed her in a fit of rage after being resisted. Yan Xinyi pointed to the photo and told them that Li Xuemei was naked, with bruises on her thighs and knees, proving that the murderer tried to have sex with her, but was resisted. But even so, he may not be able to do it for a while, and he is a little panicked. Judging from the photos of the crime scene, there are water marks on the floor, and it is likely that he strangled her and threw water on her face in an attempt to wake her up. But it was in vain, he had to deal with her wet face, so he dragged her off the floor and pressed her head into the bucket. There is also an important meaning of dipping your head in a bucket, which is 'you have rejected me, and I will put you to shame.'"

"So, what does your profile of the criminal look like?" Zheng Ming asked eagerly.

"This man is between 20 and 30 years old, and from the point of view of the modus operandi, the murderer is neither like a hairy teenager, nor like a middle-aged man who is old and serious. The arrangement is very clumsy, indicating that this is the first time he has killed someone. However, it can also be seen that he has a violent personality and may have committed certain misdemeanors. If you are married, there are three possibilities at that time: separation, divorce and marital incompatibility, and you cannot satisfy your normal sexual needs, and you have strong desires due to psychological distortion. He tied Li Xuemei's hands with wires, the binding method is very strong and reliable, it can be seen that he is very skilled, he should be a skilled worker, his education level is not high, and he needs to be engaged in strapping work for a long time.

After some inference, Yan Xinyi looked at Zheng Ming and asked, "Among the people you have interviewed, are there any people who are eligible?" ”

"Yes!" Before Zheng Ming could speak, another criminal policeman, Fu Qingren, preemptively replied, "It's really a god, there is a person who is very consistent with what you said, and he is the number one suspect we locked up at that time." ”

"That person's name is Cai Aqi." Zheng Ming interface.

"Cai Aqi?" Yan Xinyi's heart was shocked, and her eyes widened, "Let's talk about Cai Aqi's situation." ”

"Cai Aqi, 27 years old, lived diagonally across from Li Xuemei's house, was a tenant, a worker in a nearby paper leather factory, had only a Chinese level, and was divorced at the time of the case." Fu Qingren said that Li Xuemei's fiancé Zhang Feng likes to play mahjong very much, and after Cai Aqi got acquainted with him, he often went to the basement of their house to play mahjong. Cai Aqi is vulgar and short-tempered, and his first impression is very bad.

"The murderer is very likely to be Cai Aqi." Yan Xinyi said.

"We also believe that the murderer is very likely to be Cai Aqi, but no eyewitnesses have been found, and there is a lack of key evidence to prove that he is the murderer." Zheng Ming has been suffering from this.

The police questioned many people who may have been in contact with Li Xuemei shortly before she was killed, and also identified Cai Aqi as the main suspect through various clues obtained.