Police Chen Shu

Chapter 793 99% and 1%

When Chen Shu, He Chengfeng, and Huang Mao were talking in the room, Zhu Yiba, Chen Chuan, and Jiang Hai also came in.

In the room, He Chengfeng, who was gradually convinced, explained the cause and effect of the case in detail.

The case was very simple, that is, the deceased met Zheng Jie on the Internet and fell in love.

Zheng Jie introduced the deceased to a fake futures pig-killing scheme, which deceived him of hundreds of thousands of yuan and then killed him in the hotel.

Of course, Zheng Jie has not admitted that he killed the person until now.

Chen Shu thought for a while and approached from another aspect: "Did Zheng Jie's mother, the hotel cleaner Zheng Amei, confess?"

"No, she didn't admit anything, but I guess she was at least an accomplice." He Chengfeng recalled for a moment and spoke slowly. Obviously, the focus was not on Zheng Amei during the interrogation, but at a glance, the old woman was basically inseparable from the case.

Policemen with rich experience in handling cases have been fighting criminals for many years, especially in China, where confessions are the first priority. At least half of their daily work is spent on guessing and interrogating various people. Therefore, they are not 100% accurate in judging people, but at least 90% accurate.

Generally speaking, ordinary people who have never been to a public security unit are suddenly locked up in a closed and narrow interrogation room by a fierce-looking policeman with a gun.

Face-to-face interrogation basically means that they will be defeated in a few strokes, and they will have to spit out everything they should and shouldn't say, because most people have not experienced such a high-intensity and high-pressure situation.

In particular, the police who interrogate them have rich experience in fighting and master various psychological skills, so people's psychological defenses can be easily broken.

Unless someone like Zheng Amei is bound by the mother-son relationship and protected by her genes, she may not confess.

After all, in such a murder case, if the son confesses, he will be shot, and there is still a probability that the mother will not confess.

However, their refusal to speak could not conceal their uncontrollable expressions and emotions when facing interrogation.

Simply put, in the eyes of the police, they had the words "I am guilty" clearly engraved on their faces.

Chen Shu nodded, agreeing with Cheng Feng's judgment.

After Chen Shu asked several questions, He Chengfeng smelled something and said quickly: "Officer Chen, you mean, Zheng Jie climbed into the room of the deceased with a rope, and then escaped with the rope after the action? But he has a complete alibi!" Jiang Hai frowned and thought hard, then murmured: "Murder in a closed room. Murder in a closed room." Chen Shu saw Jiang Hai thinking, so he tried to guide his thoughts: "Well, why don't we worry about Zheng Jie's alibi for now. Just talking about this person, do you think he is the murderer?" He Chengfeng nodded and affirmed: "It must be! At present, all signs point to Zheng Jie, but there is no evidence that he entered the room, and he will never speak. Alas!" Killing a person is a consciousness that Chinese people have had since ancient times. If you admit it, you will be shot, and if you don't admit it, there may be a way to survive. Even if the probability is only 1%, most people are willing to try. So when the police face a murderer, it is difficult to rely on confessions to convict. However, in the order of handling the case, the main thing is to get the confession first, and then find witnesses and physical evidence according to the confession, so as to form a closed chain of evidence.

On the other hand, if the confession cannot solve the problem, we have to find a way from the physical evidence.

For the sake of beauty, the hotel's outer wall is flat, and there are no water pipes and air conditioner units for climbing. It is impossible for the suspect to enter the room through the outer wall, and there is not even a place to use leverage.

Therefore, only tools can solve this problem.

The problem is back to the point that Chen Shu raised earlier.

Since the problem of Zheng Jie entering the crime scene cannot be solved, then change the angle and make an inference from his leaving the crime scene.

Chen Shu took out a yellow-skinned cigarette and distributed it to several people present. When he handed it to Jiang Hai, he saw that the other party also stupidly stretched out his hand to collect it, and gave him a chestnut on the forehead.

He said slowly: "According to the 24-hour surveillance, there is no possibility for Zheng Jie to leave the corridor or the ceiling. Then according to the traces of the fresh muddy rope from downstairs on the curtains in the room, we can assume that Zheng Jie used the rope to leave the room through the window.

"Imagine, if Zheng Jie left the room with a rope, then the rope he used would eventually be tied in the room and could not be taken away." He Chengfeng was a little confused and asked with a frown: "But didn't you say that Zheng Amei didn't get rid of the rope tied in the room when she entered the room the next day? Then where did the rope go?" Chen Shu looked at Jiang Hai and saw that the other party seemed to understand, so he suggested: "Captain He, I think we can go out and buy a thick rope to go to the scene for a field exercise, which will surely be much better than daydreaming here. "

As soon as he said it, Huangmao borrowed a bundle of thick ropes from the hotel property and went straight to the crime scene.

On the way, Chen Shu and Jiang Hai, who followed him, talked about their own experience: "Sometimes we sit in the office and can't figure out the problem, so we can try to do a few experiments on the spot. Sometimes we get unexpected information by moving. "

"Yeah!" Jiang Hai responded heavily, his cheeks flushed.

Everyone came to the room where the crime occurred. Huang Mao spread out the thick rope and placed it next to the traced curtain fabric.

Surrounded by the thick rope and curtain cloth, Chen Shu squatted on the side and stared quietly, then took the rope and curtain cloth in his hand and looked around.

The rope is very ordinary, about eight millimeters in diameter, which is smaller than the marks left on the curtain cloth. The specifications of the two are different.

Chen Shu weighed the thick rope in his hand and murmured: "This rope is more than enough for hanging. If it were thicker, it wouldn't be a problem for climbing."

After a pause, he turned his head and asked He Chengfeng: "He Da, how thick is the rope used to hang the deceased? What is its diameter?"

He Chengfeng gestured with his hands and hesitated: "It's probably this thick. I have to ask how much it is. It feels like it should be about the same size as the rope that left traces on the curtain cloth."

In other words, the thick rope with traces on the curtain cloth and the thick rope used to hang the deceased are consistent in specifications, so there is a high probability that it is the same rope.

However, the rope used to hang himself was clean and there was no dirt stuck to it, so there should be another rope hidden at the scene, or another one that was cut off by Zheng Jie.

Although he was confident, Chen Shu still confirmed with the local criminal police: "Heda, have you checked the surveillance after the crime? Has anyone returned to the scene of the crime?"

"After the crime? Do we still need to check the video after the crime?" He Chengfeng was stunned, then slowly shook his head, "I haven't checked it yet. After we arrested Zheng Jie, we have been keeping an eye on that guy."

Did we capture Zheng Jie?

Is it the person you arrested?

You still thought it was a suicide case!

This is so thick-skinned!

Chen Chuan, who had been following behind, couldn't help but sigh secretly when he heard this.

Seeing this, Zhu Yiba quietly pulled Chen Chuan in. Seeing that the other party turned his head with an impatient look on his face, he could only smile silently at each other.

He Chengfeng continued: "With so many things in my hands, I thought that just locking people up and scaring them a few times would be enough."

The habit of the old police officer is still to give oral confessions.

Even though the current homicide investigation will pay more attention to the integrity of the evidence chain in subsequent court trials, in the early stages of case handling, the police still give oral confessions their first priority.

After arresting a highly suspected criminal suspect, the police will naturally focus on interrogation, arranging personnel to take turns and conduct surprise interrogations continuously, thereby neglecting the investigation and collection of other physical evidence.

Chen Shu nodded slightly and stopped worrying about this issue. He confirmed to the other party: "By the way, is the soil on the curtain cloth coming from the mud grass downstairs?"

He Chengfeng looked embarrassed and ashamed. He had never checked this thing, although judging from the situation at the scene, it was basically the same.

Officer Chen, I will contact the team and ask them to check it immediately. He Chengfeng said quickly, then took out his mobile phone and hurriedly walked to the corridor outside the house.

After Chen Shu watched him and Cheng Feng leave the room, he turned to look at Jiang Hai, who was squatting on the ground, turning over and over to check the curtain cloth that held serious suspicions.

Jiang Hai noticed that someone was looking at him, turned around, raised his head and asked: "Brother Shu, the thick rope mud marks on the curtain cloth are from downstairs. Why do you need to collect them for confirmation? Didn't you just rely on the evidence before? Does this thing judge that Zheng Jie escaped from the window by using a rope? "

Chen Shu walked to the window, squatted on the edge of Jianghai, pointed to the marks on the curtain cloth, and slowly explained: "Yes, I'm sure 99% of the things on it were glued downstairs."

"Then why are you still?"

"Isn't there another 1% possibility?"

Jiang Hai was stunned for a moment, smacking his mouth, thinking about this 1% possibility.