When analyzing this case, no one has a clue.
The first thing is to analyze the scene.
Almost all the furniture at the scene was covered with dust to a similar degree, indicating that no one had entered the house for a long time.
The door was open for several hours. There was no heating in the room, but it was not too cold, at least 13 or 14 degrees, and very humid. If the heating was turned on, it would cost at least a few hundred yuan more for the four months of winter, and Xiao was unwilling to pay this money.
In this kind of residential building, the sealing is better, so it won't be too cold even in winter, because there are basically heaters around. But if there is no heater in your house in winter, it will be very humid, but for Xiao, who doesn't care about his appearance, this is not a big deal.
A special footprint expert came to the scene, and Wang Huadong also went to the scene and carefully investigated for more than an hour. Everyone came to the same conclusion - this was not the first scene.
What is certain is that the evidence in this room is well preserved, and there can be no unnecessary changes. Because there is a thin layer of dust, it can be confirmed that there are only Xiao's own footprints in the room, and no footprints of others were found even on the outside of the door.
This is the fourth floor, the windows are sealed, and there have been no recent changes.
The toxicity test result came out quickly - cyanide poisoning.
To be precise, it is cyanide poisoning caused by inhalation, not ingestion!
The food has been tested and there is nothing wrong with it.
The clarity of the camera here is still not high enough, but it can be concluded that Xiao used his key to open the door and enter the house by himself, and then less than half an hour later, he opened the door and walked out, and then entered the blind spot of the camera and entered the corridor.
It is impossible to tell from the video whether he was already poisoned when he came out, but judging from the scene, he must have been poisoned after leaving the house. Judging from the video and the time of death, Xiao should have died within an hour after entering the corridor.
So, why did Xiao come out of the house?
After coming out, how did he get poisoned? What happened in the corridor?
Who would do such a thing? What is the motive?
There are still people walking in the corridor here. You can see many footprints in the corridor now. Because the windows are closed in winter, there is no wind in the corridor, and the footprints from a few days ago are still there. Not many people walk in this corridor, and we are now checking one by one all the people who have walked on the stairs in the past week and the condition of their shoes.
But there was also a very unfortunate situation. After the first wave of police arrived, they opened the windows for ventilation for a while, and there were some slight changes in the corridor.
This is not the police's fault. The person who called the police said that the person might still be alive. When the police arrived, their first reaction was definitely gas poisoning, so it was right to open the window.
Later it was discovered that the man was dead and the window was closed, but what consequences the northwest wind had caused remain to be considered.
"Where is the interpersonal relationship map of the deceased?" asked Captain Zhuang.
"Bring it over later. This is not easy to check and will take time." Captain Zhao said.
"Are interpersonal relationships too complicated?" Captain Zhou from the Second Battalion of the First Detachment frowned.
"No, it's a bit simple, but it's hard to investigate. His interpersonal relationships are rather fragmented. He knows five types of people, and these five types of people don't know each other very well. The first is his parents and relatives who have cut off contact, the second is his few friends who he has a decent relationship with, the third is his former colleagues at the agency, the fourth is a few clients, and the fifth is his friends in the game. So far, no one has been found to have such a big grudge against him." Captain Zhao said: "Speaking of which, he had a quarrel with the prison guard this morning, saying that the guard was targeting him, but it ended in nothing."
"Where is the source of the cyanide? Have you made any progress?" Team Leader Zhuang asked, "Have you ruled out suicide?"
"It hasn't been ruled out. The problem now is very obvious, that is, the source of cyanide has not been found. If Xiao got some hydrogen cyanide himself, and then ran to the corridor to smell the smell and committed suicide, this is the only possible explanation at present." Captain Zhao packed up the few materials in his hand.
Captain Zhuang looked at Bai Song. Bai Song looked directly into his eyes and shook his head.
Several people from Team 5, Wang Liang went to check the surveillance, Sun Jie went to cooperate with the autopsy, Wang Huadong went to investigate the scene, and Liu Shuyuan was summarizing and compiling other information. The clues sent to him at present were far from enough. Captain Zhao was right. Although suicide was a very ridiculous statement, it was the only explanation.
The hydrogen cyanide used in Sun's suicide case is actually quite unstable. Its industrial uses are electroplating and mining, and it is rarely available. It can spontaneously combust in the air, is extremely volatile, and is unstable in its own state, so it cannot be stored for a long time. Even if it is placed in a cylinder, it can only be stored for about three months at most, otherwise it is easy to explode when used.
The case of Mr. Sun is easy to understand. With Chang Cheh helping him, it was easy to get this thing.
So what's the matter with this case?
Moreover, Xiao's background is very clear, because he plays games, and basically all his game accounts have been checked. He has nothing else to do in recent years, just idle, working as an intermediary at work, playing games after get off work, and occasionally skipping work to play games, all night long...
Could this lead to a fatal disaster?
Captain Zhao was a little unhappy. The expression on Captain Zhuang's face when he looked at Bai Song just now made him feel a little uncomfortable, but he was also helpless at this time because this was the situation of the case.
Because Xingang District is close to the sea, the population is unevenly distributed, there are many construction sites and a large number of non-local people, there have been several homicides every year in recent years. This is normal, but most of them are simple.
Captain Zhao thought the last difficult case was an isolated incident, but he didn't expect to encounter another one.
Moreover, it is only a week until 2015, and the story of all the murder cases in 2014 being solved is over.
Captain Zhuang looked at Bai Song again and found that Bai Song had no expression. He said, "I will report to the leader later."
Ask for instructions frequently and report more often, this is the golden rule.
Captain Zhuang made the call in front of everyone and explained the situation.
"What happened to the police officer who opened the window? Ask them to write a statement later." Director Wei said clearly on the phone: "Do you have enough manpower? If the case is difficult and complicated, you can bring Team 5 over."
"They just brought him here." Captain Zhuang said, "The case report hasn't been issued yet, so the cause of death cannot be determined."
"I understand. Please wait for my news." Director Wei hung up the phone.
Captain Zhao's face was not good, not because Director Wei valued Bai Song, but because it was very troublesome to ask the policeman who opened the window to write a statement of the situation. This matter could be small or big! In front of this matter, he didn't consider anything else.
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