[Game Story]
File: On December 3, 1990, the Murder Case in Changzhuang Community.
 
Suspect in custody: Wang Aiguo
Responsible Interpol: Liu Qingchun
Police Unit: Police Station, Changzhuang Town, Fengtai District
 
Incident description:
On December 3, 1990, the police received a report saying that some people in the 401 building of Changzhuang Community were going crazy, and injured many neighbors in the same building with a knife. Police came to the scene and found that several residents had various degrees of stab wounds.
After Wang Aiguo was arrested, the police came to his house, and was surprised to find that his wife and son had died at home, and had been dead for 2 days after forensic examination.
 
Personnel situation:
Wang Aiguo: 35 years old, electrician, employee of Changzhuang Iron and Steel Plant
Sun Meiqi (deceased): 38 years old, kindergarten teacher, kindergarten employee in Changzhuang Town.
Wang Sifeng (deceased): 10 years old, fifth grade student in Changzhuang Town Primary School.
 
The police asked Wang Aiguo, but Wang Aiguo didn't seem to know.
 Wang Aiguo's confession: "I came with my wife for lunch at noon, and the child went to school early in the morning, how could he die at home. Please tell me what happened. Those people are not good people, and they always bully me, I am anxious They chopped them with a knife. "Wang Aiguo also said that in the past month, we could hear strange sounds in the corridor every night, and it was not like people talking. The wife heard it and did not dare to tell the child. Looking through the door mirror, nothing can be seen.

 Forensic autopsy report:
Sun Meiqi, female, was severely hit on the back of her head, not fatal. Cause of death: Insertion of steel nails into the heart.
Wang Sifeng, male, cause of death: suffocation. There was a noticeable scar on the neck, and the third and fourth fingers of the right hand were fractured.
 The police found the residents of Gate 403 to make an inquiry.

 Ms. Zhang Hongjun's confession of 403: "Wang Aiguo is usually good. He has never been in a neighborhood, but there is something strange. It has been going on for 1 month. The door is noisy every night, but it sounds like ordinary. The couple quarreled, often with strange noises. Once I and the aunt Wang of the neighborhood committee went to the house to talk about the mediation. Who would think that Wang Aiguo and his wife Sun Meiqi did not it the quarrel at all and could not do street work. "
The strangest thing is that Zhang Hongjun claimed that Wang Aiguo could still hear quarrels and strange noises every night after being arrested.
 
Site survey report:
There were no traces of fighting in the house. Sun Meiqi was found dead on the bed when found, the child Wang Sifeng died in the toilet, and the toilet door was closed. There were no fingerprints in the room except Wang Aiguo's family. All doors and windows have not been traced.
 
The responsible criminal police decided to visit Wang Aiguo's home at night when the neighbor said.

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