"We have all studied modern history in books, and many of the teachers here have also experienced some changes in the times, and we take Tianhua City as an example, and I will talk about a few things that most people should not have heard. It's not thrilling, it's even commonplace.

Our living standards are getting higher and higher, and the pressure seems to be increasing, but do you know that 30 years ago, the suicide rate was actually several times higher than it is now? Let me first ask you, for example, how do you think hanging is done?" asked Bai Song.

Everyone didn't expect Bai Song to ask such a question first, but many people still stood up and expressed their understanding.

Find a beam, a rope, and a table.

This is almost everyone's understanding of hanging.

Bai Song turned on the projector in the lecture hall, and here was a sketch, and the painter was Wang Huadong.

The house is surrounded by four walls, no beams, and no ropes. This is a black-and-white sketch, which is a little depressing, and in the middle of the picture, a woman hangs in the middle of a large cabinet and a kang.

This may be the cabinet where the woman got married, or it may be made later, the same height as the kang head, less than 80 centimeters high, and the quality of the cabinet cannot be seen in the sketch.

There was only a 10 centimeter gap between the cabinet and the kang, and the woman put her neck between the kang and the cabinet, and the strength of her upper body pressed on a chopstick, her legs were half kneeling, and she was hanged by a chopstick in a daze.

"It's a chopstick. Bai Song pointed to the stick that supported the woman: "It is also a tool for hanging." ”

This woman looks thin and unbearable, and this posture and movement make people feel inexplicably sad.

This is a way to find no dignity even if you want to die.

All the students and teachers were in an uproar, they hadn't seen this before!

They only heard about the use of ropes, but they didn't expect that the poor people couldn't find the ropes, or even what to do if they couldn't find the beams!

"I think, no matter what I asked, everyone has different experiences. Bai Song said: "Most of us, like me, will eventually take up the post of public security." Public safety, we have been in the police for decades, and it is natural that we will experience the changes of the times. I'm talking about this, it happened when the old policeman next to me went to work. Maybe you think this would have happened hundreds of years ago, but it was decades ago. I'll show you the case again. ”

After speaking, Bai Song showed everyone a case of suicide by burning charcoal, which is also very representative now.

Everyone may have heard this word, and in the future work, everyone will definitely have similar discoveries. Bai Song smiled slightly.

Some people nodded as if they didn't understand, and many more were still at a loss.

"Inspector Bai, is this a pattern?" a girl raised her hand and asked.

Bai Song thought for a moment: "Count, it doesn't count." Manpower is sometimes exhausted, and it is impossible for any of us to figure out all the people in the jurisdiction, and it is impossible to understand the ins and outs of each case. Especially at the police station, I believe that our classmates are full of fighting spirit, but a considerable number of them will grind your fighting spirit at the police station.

Every day is trivial, and when I encounter a big case, I don't even have the qualifications to participate, and three or five years pass in a flash, which is a very real thing. At that time, everyone is faced with buying a house, raising a family, and facing firewood, rice, oil and salt, and the feeling is not so simple. We are all the same age, and I don't want to give you a sense of reasoning, but if I can make everyone think a little more before going to work, it will be very successful. ”

After speaking, Bai Song clapped his hands: "The course has officially started, and I will talk about criminal investigation today." ”

This is also a textbook that Bai Song and others have been compiling recently.

Recently, they have bought all the similar books available on the market, none of which were written by front-line workers, and there are a lot of theoretical things.

Of course, these bigwigs are not divorced from reality, and many contents, such as the use of special situations, are very well described, and Bai Song and others need to learn more.

The cases that Bai Song is telling today are all cases that he has solved, and they are all cases that have been out of secrecy.

For example, the case of Yao Xin's murder of his father, if you want to tell it in reverse, it is:

"Filial piety to the children to the father's birthday, the father alone at home to eat cake but caused a B bomb, the scene after the fire extinguished, all the evidence has disappeared, in the process of investigation, but caused a huge conflict between the children, the daughter killed the brother ... All this, what is it..."

Writing cases, they are all written in such a reverse direction, writing some strange and suspenseful beginnings, standing in the perspective of God, showing the most incomprehensible things in this case first to attract readers, and then slowly deciphering them.

Although this often feels like "nothing more than that" when it comes to solving mysteries, it is really eye-catching.

It's a pity that Bai Song and others are not from this perspective in handling the case. Their handling of cases is from the perspective of the police, and there is no way to progress from the most suspenseful and interesting places first, so they can only advance one by one.

As a professional criminal policeman, Bai Song's understanding of many cases is still relatively in place. The leader of a case plays a vital role.

For example, when handling any case, it is divided into two parts to investigate, the first is the basic department, and the second is the research and judgment department.

The basic department is very simple, that is, what can be done in every case. For example, to check surveillance, call and chat records, check human and physical evidence, on-site investigation, body identification, household water consumption, electricity consumption, purchase of unknown substances, car commuting, recent close contacts, neighbors, and so on.

These are all things to be investigated. In the investigation of these basic issues, it is possible to do whatever it takes to investigate and investigate important homicide cases.

The second is research and judgment. These things are in hand and become meaningful and valuable clues, which are not as intuitive as in the book, and require a certain grasp of human nature.

Bai Song originally thought that he could only speak for two hours, and the lesson plan he prepared was only two hours, but before he knew it, he had already spoken until four o'clock, and the students were fascinated by it.

There are many people who go to the toilet halfway through, but still come back after going to the toilet.

Although this is not his alma mater, Bai Song still unreservedly told all his experiences in the past few years. Over the years, the future has been the mainstay of Tianhua City.

"That's all I have to say about the case. Modern investigation is a broad and profound discipline, two days ago, my team members told you about the scene investigation, autopsy and the application of electronic computers, three days of explanation is here, I hope it will be helpful to you. Bai Song bowed to everyone and ended the lecture.

Thunderous applause.