Bai Song pondered for a long time, and he understood, "The '12.01' task force has already started closing the net in these short ten days. The task force at this time is very reluctant to cause any complications."
After spending the whole morning here, Bai Song also made some analysis of the case. At this time, the cause of death of the deceased had also been determined by preliminary test results, which showed that the victim died of hydrogen cyanide poisoning.
Cyanide is a well-known poisonous substance. Basically, anything with the word "cyanide" in it will kill people if eaten.
Hydrogen cyanide, unlike common sodium cyanide and potassium cyanide, is a colorless and transparent liquid. Using substances such as potassium cyanide and reacting with acid can produce hydrogen cyanide gas.
Hydrogen cyanide itself is very volatile and has a bitter almond smell. When there is more than 0.003 grams of hydrogen cyanide gas per cubic meter in a room, it will be fatal to the human body. Theoretically, a Coke bottle filled with hydrogen cyanide is enough to kill 1,200 people.
The cyanide ion of hydrogen cyanide can significantly reduce the activity of more than 40 enzymes in the human body, quickly combine with the trivalent iron in the oxidative cytochrome oxidase, prevent it from being reduced to divalent iron, interrupt the oxidation process of electron transfer, and prevent tissue cells from utilizing oxygen in the blood, causing internal suffocation.
Because the central nervous system is most sensitive to hypoxia, the brain is damaged first, leading to central respiratory failure and death.
If you inhale high concentrations of hydrogen cyanide or swallow a large amount of cyanide in a short period of time, you will stop breathing and die within two or three minutes.
No cyanide was found at the scene. As the door was wide open, there was no cyanide residue in the gas inside the house. The police who arrived at the scene first did not smell the so-called bitter almond smell.
Bai Song was not the lead police officer in charge of the case. He had been thinking about one thing all morning.
If the level of the city bureau's forensic doctors is really high, then on what basis did they come to the conclusion that "there is a possibility of suicide"?
Professionals are different. Bai Song deeply understands the meaning of "every profession has its own expertise". He never looks down on these professionals, but there is indeed not much overlap between them, and Bai Song has no way to ask.
After returning to the institute, Bai Song chatted with Feng Bao, who cleared up some of Bai Song's doubts. Many experts from large organizations usually leave room for maneuvers, and leave a few more possibilities for scenes that they are not sure about. Bai Song also thinks Feng Bao's point of view is possible, but the case has already been reported, so he still needs to continue the investigation.
In the afternoon, Master Sun Tang found Bai Song.
"I just heard that the task force you wanted to join is recruiting people recently. Have you signed up?" Sun Tang asked.
"No, I found out that the case is beginning to come to an end. I won't sign up." Bai Song shook his head, thinking that Li Han was really well-informed.
"Finished? Then don't go. It will be boring if you go." Sun Tang nodded.
"Master, why do we need to recruit people when the case is about to be concluded?" Bai Song was a little confused.
"In fact, it is not difficult to solve the case, arrest people, and even criminal detention is not difficult. The most difficult part of the case is the follow-up work." Sun Tang pointed to several files on the group's desk: "In a large-scale telecommunications fraud case, dozens of people are arrested. There will be a lot of follow-up work, and it will take several months to finish. The case files can be piled on three or four tables, and each one is this thick." Sun Tang gestured with his fingers. It was about five or six centimeters.
Bai Song nodded to show that he understood. He had seen how thick the case file was in Wang Qianyi's case of illegal wildlife trading. For a large-scale fraud case, the follow-up work was actually the bulk of the work.
"Well, I'd better not go. I can learn the business of handling cases here at the police station." Bai Song said he understood.
"I asked you to come here because there is another matter. Did Chief Wei ask you for help yesterday?"
"Well, I went with Chief Wei. It was the case of stealing electric bicycle batteries in our group. I went with Chief Wei to catch two thieves."
"Young people like you, living in the station, there must be some leaders who like to ask you to work overtime. This is quite dangerous. I know you well. First, you will not refuse such a thing. Second, you will definitely be in the front. You can't even carry a gun now, it is really unsafe." Sun Tang pointed to the southeast: "My child's grandfather has moved in with me. There is a small house with an area of about 50 square meters. It has been idle for three years. It is on the sixth floor and it can't be rented out for much money. I have been too lazy to fix it. If you don't mind, you can get some new mattresses and quilts and move in. I will hire a housekeeping company to clean the whole house for you later."
"Ah? No, no, Master, how can I do this? I'm doing fine at work. Chief Wei is actually giving me some training." Bai Song scratched his head.
"Just think about it yourself." After Sun Tang finished speaking, he continued, "Let's not talk about this matter anymore. You can think about it yourself later. I'm too lazy to rent my house. You decide for yourself. There is another thing, which is about today's murder case. I see that you are very interested in it."
"Yeah!" Bai Song did not hide his emotions.
"Well, OK, young man, that's how you should be. If you want to deal with everything properly and keep yourself out of trouble, you will have no future." Sun Tang took out his notebook: "The station just held a meeting. The second criminal investigation team is in charge of this case. The station should not be involved in this matter, but Chief Sun and Li Jiao both said that they would investigate the case strictly. After all, this kind of premeditated and professional murder case is rare, and it happened in our jurisdiction. Chief Sun must be embarrassed.
The station plans to set up a case handling team. Each group will select one person to be the member of the case handling team. The team will be led by Wei and Xiao Wang, a total of six people. The selected people from each group will not leave their original team and will continue to work as usual, but they will not be assigned to night shifts. They will sleep as usual on the night of their shifts. They don't need to get up unless there is something special, so they will not take a compensatory day off the next day and must continue to work.
This job requires a certain level of enthusiasm, and the family pressure cannot be too great. I originally wanted to arrange Feng Bao for our group, but his child is now two years old and is always sick, so I thought of recommending you and came to ask you. If you want to participate, I will sign you up."
"Yes, Master. I have no problem with that. I can also work the night shift as usual. I am also interested in the case." Bai Song looked a little excited.
"Haha, good, you are young, that's good." Sun Tang thought for a moment and said, "That's not right, other young people rarely have your enthusiasm. OK, then I'll report it to you. If this matter can be accomplished, it will bring honor to the institute, to Director Sun, and to Principal Li."
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