When Chen Shu, Cheng Feng, and Huang Mao were talking in the room, Zhu Yiba, Chen Chuan and Jiang Hai also walked in.
In the room, He Chengfeng, who gradually became convinced, explained the ins and outs of the case in detail.
The case is very simple, that is, the deceased met Zheng Jie online and fell in love.
Zheng Jie introduced the deceased to a forged futures pig-killing plate, and after he was defrauded of hundreds of thousands, he was killed by Zheng Jie in the hotel.
Of course, Zheng Jie still has not admitted that he killed the person.
Chen Shu thought for a while and then approached from another aspect: "Did Zheng Jie's mother, the hotel cleaner Zheng Amei, confess?"
"No, I don't admit anything, but I guess he is at least an accomplice." He Chengfeng recalled for a moment and said slowly. It was obvious that the focus of the interrogation was not on Zheng Amei, but a quick look at the old woman basically revealed that she was an accomplice.
It has nothing to do with the case.
Police officers with rich experience in handling cases have been fighting criminals for many years, especially in China, which emphasizes oral confessions as the first investigative method. At least half of their daily work is spent on guessing and interrogating various people, so when it comes to people, it is not necessary to
To say it's 100% accurate, it's at least 90% accurate.
Generally speaking, if ordinary people who have never entered a public security unit are suddenly locked into a closed and small interrogation room by police officers with loaded guns and fierce faces one day.
In a face-to-face interrogation, you will basically be defeated in a few seconds, and you will have to spit out everything that should be said and should not be said, because most people have not experienced such a high-intensity, high-pressure situation.
In particular, the police officers who interrogate them have rich fighting experience and master various psychological skills, so people's psychological defenses can be easily broken through.
Unless someone like Zheng Amei is bound by mother-son affection and has protection engraved in her genes, it would be possible for her to refuse to let go.
After all, in this kind of murder case, if the son lets go, he will be shot, so there is still a chance that the mother will not confess.
However, remaining silent could not conceal the uncontrollable demeanor and emotions they showed when facing interrogation.
To put it simply, in the eyes of the police, they have clearly carved the words "I'm guilty" on their faces.
Chen Shu nodded and agreed with He Chengfeng's judgment.
After Chen Shu asked several questions, He Chengfeng started to smell something and said quickly: "Officer Chen, you mean that Zheng Jie climbed into the deceased's room through a rope, and then used the rope to climb into the room.
Escaped? But he has a complete alibi!"
Jiang Hai frowned and thought hard, then murmured: "Secret room murder...Secret room murder..."
When Chen Shu saw Jiang Hai thinking, he tried to guide the other party's thinking: "Well, how about we ignore 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 even if there is no evidence that he entered the room, he refuses to speak. Alas!"
Killing for life has been a subconscious awareness of Chinese people since ancient times. If you admit it, you will be shot, but if you don't, there may be a way to survive. Even if the probability is only 1%, most people are willing to try it.
Therefore, when facing a murderer, it is very difficult for the police to rely on confession to convict him.
However, in the order of handling the case, the main priority is to obtain a confession of guilt first, and then use this confession to find witnesses and physical evidence, thereby closing the chain of evidence.
On the other hand, oral confession cannot solve the problem, so we have to find a solution based on physical evidence.
For the sake of beauty, the hotel’s exterior walls are flat and there are no water pipes or air-conditioning units for climbing. It is impossible for a criminal suspect to enter the room through the exterior wall. There is not even a place to borrow strength.
.
Therefore, only using tools can solve this problem.
The question circled back to the point that Chen Shu raised before.
Since the problem of Zheng Jie entering the crime scene cannot be solved, let's change the angle and make an inference based on his leaving the crime scene.
Chen Shu took out his yellow leather cigarette and spread it around the people present. When he handed it to Jiang Hai, he saw that the other party also stretched out his hand stupidly to put it away, so he gave him a chestnut on the forehead with his backhand.
He said slowly: "According to the 24-hour surveillance, there is no possibility of Zheng Jie leaving in the corridor and ceiling. Then based on the traces of fresh muddy ropes from downstairs on the curtains in the room, we can assume that Zheng Jie
Use a rope to leave the room through the window.
"Just imagine, if Zheng Jie left the room through a rope, the rope he used would eventually be tied up in the room and cannot be taken away."
He Chengfeng was a little stunned, and frowned and asked: "But didn't you say that Zheng Amei didn't dispose 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: "He and the brigade, I think we can go outside and buy a thick rope to go to the site for a practical exercise. I think it will be much better than dreaming here.
.”
As soon as he said it, Huang Mao borrowed a bundle of thick rope from the hotel management and went straight to the crime scene.
On the way, Chen Shu talked about his experience with Jiang Hai who was following him: "Sometimes when we sit in the office and are puzzled, we can try to do a few experiments on site. Sometimes when we move, we will get unexpected results.
information."
"Yes!" Jiang Hai responded seriously, his cheeks red.
Everyone came to the room where the crime occurred. Huang Mao spread out the thick rope and placed it next to the curtain cloth with traces on it.
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 for hanging was very 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, and then slowly shook his head, "No... I haven't checked. After we arrested Zheng Jie, we have been keeping an eye on that guy.
.”
We caught Zheng Jie?
Is this the person you arrested?
You still thought it was a suicide case!
You are 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 person 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 it would be easy to lock people up and scare them a few times."
The old police officer's habit is still to give oral confessions.
Even though the current murder case investigation will pay more attention to the integrity of the evidence chain in subsequent court trials, in the early stage of case handling, the police still give oral confessions as their first priority.
After arresting a highly suspected criminal suspect, the police will naturally focus on interrogation, arrange personnel to take turns, and conduct continuous surprise interrogations, thereby neglecting the investigation and collection of other physical evidence.
Chen Shu nodded slightly, did not dwell on this issue anymore, and 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 cell phone and hurried 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 curtains 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.