The firemen felt that something was wrong, and while actively putting out the fire, they informed the public security bureau. After the fire was put out, the criminal police entered the scene and saw a lot of blood at the door of the bathroom. After pushing the door open, a strong smell of blood came to my face, and there was a lot of blood on the toilet and washbasin.
A pair of scissors and the cap of a white wine bottle were found at the scene. There are some burning residues on the ground. After testing, they are rags containing alcohol. Investigators concluded that scissors and bottle caps may have been left behind by arsonists. Scissors are used to cut cloth, while liquor is used as a combustion-supporting substance. Unfortunately, the biological information of the suspect was not extracted from scissors and bottle caps.
During the criminal police investigation, news came that the injured died on the way to the hospital. According to the situation on the spot, the police positioned it as "intentional homicide and arson".
The deceased named Liu Yu, 32, was the hostess of the burning house. Forensic identification showed that Liu Yu had five stab wounds in her neck, which led to excessive blood loss and death. In addition, Liu Yu has six stab wounds in his left chest. The cruelty of the suspect made the forensic doctor unable to bear to look straight.
Generally speaking, arson after murder is to destroy evidence. Liu Yu is young and handsome. The police suspected that the suspect had sexually assaulted him and wanted to destroy the scene by setting fire, but subsequent inspections did not find this sign.
The doors and windows of the crime scene were not damaged, but a key was inserted in the door. Upon inquiry, I learned that the key was left by my late husband wang hong.
It was September 1 1. Wang hong recalled that his wife sent her children to school in the morning and left home first. Then he got up and washed and went to work in the company. When he left, his wife had not come home. At 9 o'clock in the morning, when he was at work, he suddenly received a text message from his wife saying that she had a stomachache. She wants to go to the hospital and ask where the money is.
Wang hong was surprised by the content of the short message, because the couple never enlarged the amount of cash at home, and everything was swiped. Therefore, when he saw his wife directly asking where the money was, he felt abnormal.
Wang Hongsui called his wife, but no one answered, and then turned off his phone. Wang hong felt more and more suspicious, so he called a colleague to accompany him to his home, only to find that the home was on fire when he entered the community. Worried about his wife's safety, Wang Hong rushed back in three steps. Anxious to save his wife, he opened the door without taking the key. Later, he found his wife lying in a pool of blood and hurried downstairs. His colleagues didn't know the situation and thought that wang hong's wife was on fire, so they only helped to report the fire.
Wang hong can't walk fast with his wife in his arms. A few minutes later, he walked to the door of the community and happened to meet the fireman who received the call, which is the scene described at the beginning of this article.
Wang hong confirmed that no valuables were lost in the house, only two bottles of white wine were missing, which ruled out the possibility of making money.
Is it a vendetta if the suspect doesn't rob sex or money?
The doors and windows at the scene are intact, indicating that the suspect entered the room peacefully, and there is a high probability that an acquaintance committed the crime, and the premise of the vendetta is that both parties have known each other.
Based on this, the police first asked Mr. and Mrs. wang hong if they had any enemies recently, but they got a negative answer.
Two years ago, due to physical discomfort, Liu Yu quit her job and became a full-time wife. Every day, besides sending her children to and from school, she stays at home and watches TV and does housework. She has little contact with outsiders and has no chance to make enemies with others. Wang hong mainly does technical work in the unit, does not run outside, has no interest disputes with colleagues, and has no bad hobbies. He comes home from work every day and never argues with anyone.
That's weird. What is the suspect's motive?
After careful investigation by the police, there were no fingerprints, footprints and other clues at the scene, so we had to extract and identify the blood at multiple points in an attempt to find out the biological information of the suspect.
Liu Yuhe wang hong lives in an old residential building. There was no monitoring inside the community, but there was a Skynet probe not far from the gate, which made the police overjoyed and immediately read the videos before and after the incident.
At 6: 30 in the morning, Liu Yu sent his son to school as usual. There was nothing unusual in his behavior and movements. At 7: 33, wang hong went out, and at 8: 09, Liu Yu returned to the community.
Wang hong received a message from Liu Yu at 9: 0017, and drove to the screen at 9: 58. According to the police analysis, at 9: 00 in 17, the suspect must have been at Liu Yujia's house and left before 9: 58, so the man who left the community during this time was listed as the focus of investigation.
After investigation, in this 4 1 minute, * * 13 men left the community. The project police conducted a detailed inquiry and investigation on them, and they all had alibis, which ruled out the possibility of committing crimes.
However, this survey is not without results. 13 people, 5 people are renters. This made the police realize that the personnel structure of the community is complex. So, will the murderer be one of the residents in the community?
If this hypothesis holds, it reasonably explains that 13 people are not suspected, because the murderer does not have to leave the community after committing the crime, and can go back to his home and pretend that nothing happened.
In the monitoring, when Liu Yu sent her children to school and returned to the community, there were no suspicious people behind her, which also showed that the suspect did not follow her into the community from the outside.
The police quickly adjusted the investigation direction and began to investigate the residents of the community, focusing on the people in the building where Liu Yu was located. Soon, a suspicious man entered the police field of vision.
He is a neighbor across the street from the deceased Liu Yu, a 34-year-old from Chenghai, unmarried. When the police first went to understand the situation, Cheng Hai was not at home. A resident downstairs reported that his activity time was irregular and he liked drinking. When I met him in the corridor several times, he had a white wine bottle in his hand.
Chenghai is rented here. The police learned through the landlord that he was a quality supervisor of a coal company and got his phone number. As soon as they met, a detail of Cheng Hai caught the attention of the police. He wore a long-sleeved shirt with his left sleeve rolled up and his right sleeve down, feeling like he was covering something.
The investigator pretended to accidentally touch Cheng Hai's right arm, and Cheng Hai hissed and felt very painful. The investigator asked him to pull up the sleeve of his right hand, and a wound nearly three centimeters was impressively printed in his eyes.
Cheng Hai explained that the wound was accidentally scratched when going down the well, and it was inconvenient for investigators to ask too many questions. After registering, let him leave first and ask him again if necessary.
As a result, the landlord of Chenghai suddenly contacted the project police the next day and said, "Chenghai has moved."
This behavior aroused the vigilance of the investigator. He was going to ask him what was going on, but found that Cheng Hai's phone had been disconnected. The investigator immediately went to Cheng Hai's unit to understand the situation. His direct leader introduced that Cheng Hai was working in the unit at the time of the incident, and then he left in a hurry after receiving the phone call and never came back that day. Before leaving work yesterday, Chenghai took a day off and said that he would move. No one in the company knows where he is going.
On the day of the murder, he took a phone call and disappeared. After the police questioned him, he lost contact, and he lived opposite the victim Liu Yu, which made the police think that this person was very likely to have a lot to do with the case.
That night, Cheng Hai, who lost contact for one day, finally connected the phone. It turned out that there was something wrong with his mobile phone, and he didn't have time to find a place to fix it until he moved home.
But why is he in such a hurry to move?
Cheng Hai told the police that since Liu Yujia's accident, his neighbors had a wrong view of him and thought he was the murderer of Liu Yu. He was uncomfortable living there, so he had the idea of moving. On the day of the accident, he received a phone call from a familiar resident in the community, saying that the opposite door was on fire, and he was afraid of hurting his home and asked him to go back and watch. Cheng Hai also said that Wang Hong of Liu Yuhe had enthusiastically introduced his girlfriend to him. A few days before the accident, he also saw Liu Yuhe's son playing badminton in the community. Now Liu Yu died tragically. Walking in the community, remembering that such a lively person said no, it was gone, which was very unpleasant and accelerated the pace of moving.
After repeated verification, the police ruled out Cheng Hai's suspicion of committing crimes, but the direction of continuing to investigate the residents of the community has not changed.
At this time, the video investigation team made a major discovery-two days before the incident, a man appeared behind Liu Yu three times, as if following her. At noon on the day of the incident, the man came out of the community with a plastic bag in his hand.
Upon verification, the man named Liang Kang, a native of Changzhou, is the owner of the crime plot and lives in a building next to Liu Yujia.
Liang Kang is an ordinary worker in a local factory. Although the income is not high, it is relatively stable and there is no bad record. In the face of inquiry, Liang Kang is very cooperative. No matter what questions the police ask, he is patient.
However, when Liang Kang recalled the behavior at the time of the incident, it surprised the police.
It was already September 17, six days after the incident, but Liang Kang clearly remembered that he was watching a TV series at home at 9: 40 on September1/kloc-0.
In this regard, Liang Kang explained that he had been watching TV dramas during this time, and TV dramas were broadcast almost every day, so he remembered them.
This seems to make sense.
17 night, the blood test results of many places extracted from the crime scene came out. In addition to the deceased Liu Yu, there is another person's blood.
In order not to let go of any possibility, the police conducted blood tests on all the people who were suspected before.
The next morning, the test results confirmed that the blood sample was consistent with Liang Kang.
Hard evidence is like a mountain. Liang Kang knew that he could not deny it and admitted the criminal facts of murder and arson. When it comes to the motive of killing, Liang Kang admits that he and Liu Yu are lovers, because they both have families, and he doesn't want to continue. On the day of the incident, he broke up with Liu Yu, who demanded a break-up fee of100,000 yuan, claiming to tell the story of the two without giving Qian Liangkang. Liang Kang couldn't afford so much money, so he killed Liu Yu.
However, after verification by the police, Liang Kang and Liu Yu have no trace of contact on their mobile phones and social software. Wang hong also said that their husband and wife didn't know Liang Kang at all, and it was even more impossible for their wives to betray their families and have sex with such people.
All these evidences show that Liang Kang is lying, but since he has admitted the crime of killing, why did he make up the motive for killing?
Tracing back to the source, it was found that on the night of 17, Liang Kang left the community and didn't return all night after blood test DNA. Instead of running away, he went to an internet cafe. On the same day, the police used technical means to retrieve Liang Kang's online records and found that Liang Kang had searched "Will killing a lover be sentenced to death?" Among them, it is mentioned that the two sides are lovers and will not be sentenced to death if they are killed for specific reasons.
This is why Liang Kang lied. He doesn't know Liu Yu at all, but he just wants to protect himself from the death penalty.
Then why on earth did he kill Liu Yu?