A murder case occurred in a dilapidated demolition building in Siping City, Jilin Province. Because it is a dilapidated demolition building, there are no cameras in and around it, so it is relatively difficult to solve the case, only the clues found at the crime scene according to the blood. A dead man died in the stairwell on the third and fourth floors. Several forensic doctors and police found blood dripping at the scene, leading to a room on the fourth floor. After the search, a male body was found near the window of the room, which was a bit unexpected. The window next to the body is still open. I looked out of the open window and found another body in the open space outside. The police and the forensic doctor immediately launched an investigation and searched the bodies of the three deceased. They found that everyone had an ID card, and the information of the deceased came out.

After investigation, there is a very close relationship between the three deceased, and all three of them are actually very young. The dead man on the stairs is called Liu Jie, the dead man in the bedroom is called Zhang Jian, and the dead man in the open space outside is called winter. Obviously, the three of them died together, probably for murder. According to the forensic examination of the blood on the scene, the time of death of the deceased is estimated to be between 1 and 3 am. Afterwards, the police carefully checked the door locks and windows to see if there were any signs of being pried open. They found some clues, but they were all destroyed. There was no sign of destruction.

So he concluded that he knew the criminal and naturally walked into the room. There is a mahjong table in the room with cards on it. Obviously, this is a gambling place, so the police initially determined that the murder was caused by gambling. As a result, the police quickly investigated the gamblers that night, and one of them aroused suspicion. His name is Sean. After investigation, Sean disappeared after winning the prize and found that the man had a record of wounding with a knife before, but the case was more difficult because Sean did not have a stable residence.

Subsequently, the police quickly searched the suspect Sean and began to interrogate Sean. His words were somewhat evasive, and the police suspected that it was Sean. But at that moment, the police's judgment was wrong. The medical examiner called and said that the criminal should be left-handed, but Sean is right-handed. Through repeated identification and exploration by forensic doctors at the scene, it was found that there was a formed blood gushing out of a wall in Liu Jie, Liu Jie's wound, so it was spewing out from Liu Jie's neck, and it should still be running at that time.

In addition, the process of Liu Jie's murder was restored by dropping blood all the way. First, he was injured in the house, and then he escaped. Later, the prisoner ran up the stairs and killed him from the neck. Then he went to investigate Zhang Jian's death. Zhang Ji 'an may have been killed in his room. He tried to call for help, climbed onto the bed and fell on the bed. Zhang Jian's death process has largely recovered, so how did the severe winter outside the window lead to his death?

According to Sean, this gambling game is actually a trap set by Liu Jie and Zhang Ji 'an. They all want to win Dong's money and share the spoils. But Sean wanted his own, so he was mistaken for the murderer. The police thought that Yan Dong might want to get back at them, so they further investigated Yan Dong. After investigation, Yan Dong was indeed left-handed, which confirmed the police's suspicion. Investigators found blood and wiping marks at the clothing scene in the severe winter. After the forensic doctor extracted the blood from the severe winter, he found that there were also the blood of Liu Jie and Zhang Ji 'an. Later, his wife said that she had received a letter from him.

The letter said that Liu Jie and Zhang Jian let him gamble, lost his home, was heavily in debt, and he mistreated his family. We were good friends who grew up together, but when we grew up, we became enemies because of gambling, and even killed people with knives. It's really sad that this incident was exposed afterwards. There are many beautiful things in life, but don't indulge in gambling, it will really hurt a person, a family and a family, and it is not worth it. Three people in this case ruined their happiness and life.