Detective: Open your eyes, I am handcuffed in the interrogation room

Qian Yu was brought back quickly. He was at the school and was easy to find. Zhuo Yun said that he did not make any noise when he was brought back. He cooperated very well and did not resist at all.

He did not even ask the police why they took him away.

After arriving at the Municipal Bureau, Qian Yu went directly to the interrogation room and was handcuffed like his father.

Even with the handcuffs stuck on his wrists, Qian Yu still had that expression, saying nothing and asking nothing. This was not in line with the normal reaction of a normal person.

The preliminary trial began.

Chen Yi and Lu Zhengkai came to the observation room and looked closely at the young man sitting in the interrogation room.

Qian Yu looked pretty good, with clear and soft features, and clean all over like a boy next door, but the rare expression on his face lost the sense of intimacy, giving people a feeling of being quite cold and calm beyond his age.

"Name."

...

"Age."

...

"Do you know why I brought you here?"

...

"Were you at your grandmother's house the afternoon before yesterday? Have you ever left?"

...

"After leaving at nine in the evening, did you go home directly?"

...

"Have you ever met any strange people or seen any strange things?"

...

The interrogation was carried out according to the procedure. Qian Yu answered all the questions without hesitation. From beginning to end, he did not show much expression on his face. Only the occasional raised corner of his mouth proved that he was still a person with emotions.

"Qian Yu has a big problem." Lu Zhengkai said in the observation room, "Generally, when the police come to the door, they always ask the reason if they have nothing to hide, but Qian Yu has not asked until now, just passively answering our questions, and... it seems that he has prepared in advance." Chen Yi stared at Qian Yu for a long time and said, "Did you notice that he has a very strong psychological quality, or he has no fear. It is hard to imagine that a college student has such a strong psychological quality. I don't know what he has experienced." Lu Zhengkai said, "Looking at the files from the early years, Qian Yu was just beaten, and there was no harm in that aspect. At least there is no record in the injury assessment report, and the suspect's confession did not mention this matter." The two of them discussed just now whether Qian Yu might have been sexually assaulted in his early years, which led to psychological problems, and now he has become more and more vented on innocent people. At that time, Qian Yu was less than ten years old. From a psychological point of view, there is no problem with the logic, but the speculation cannot match the files. He was just hurt externally. The interrogation lasted for an hour. The interrogator asked the same question several times, and asked it again in reverse, but got the same answer.

Even the order of which road he took in Xintou Town and which corner he passed was disrupted and asked again, but Qian Yu did not reveal any flaws.

This kid is still a bit good, smart and logical.

"Team Chen, Lu Zhi, the medical records from the hospital have been obtained."

The door of the observation room opened, and a police officer came to report.

"Let's go to the meeting." Chen Yi turned around.

Meeting room.

Everyone who should have arrived was there, and the personnel were very complete, including Zhou Yebin and the entire special case team.

On the big screen, Qian Yu's rescue and surgical records of the year were displayed, including the monitoring records in the intensive care unit, which were very detailed.

Qian Yu's injury was mainly in the brain, and he underwent a craniotomy. The success rate of the operation was not high, less than 50%.

He was very lucky, and the operation was successful.

Of course, this was also the suspect's luck, otherwise the suspect would not face the charge of intentional injury, but intentional homicide or manslaughter.

"This operation..." Chen Yi glanced at the detailed operation record. Although it was just text, it could fully restore the process at that time, saving the trouble of watching the video. "Sister Su, what do you think?"

Su Ying knew more professional knowledge about medical surgery.

Su Ying had been thinking, and now in response to Chen Yi's question, she expressed her own opinion: "If Qian Yu is the murderer in this case, I agree with the judgment that it is the beginning of serial killings.

You see, the location of this operation is near the frontal cortex area. When cutting the damaged tissue, if the doctor's hand shakes a little, it is inevitable to touch the amygdala. Once the amygdala is damaged, even if it is only slightly damaged, it may cause irreversible effects on Qian Yu."

Lu Zhengkai looked at Su Ying: "What effect?"

Su Ying said: "The function of the frontal lobe of the human brain is to make behavior subject to firm intentions and motivations. Frontal lobe damage will affect emotions for a long time. It depends on which part is injured.

It may affect emotions, cognitive abilities, and mental symptoms may occur.

Assuming that Qian Yu is the murderer in this case, then the impact he has suffered is that he has lost the ability to perceive fear emotions, so he will kill people unscrupulously and have no empathy or pity for the victims. To put it bluntly, it's as simple as... us normal people killing mosquitoes and cockroaches."

Lu Zhengkai's expression became serious.

Will normal people feel pity when they kill mosquitoes? Definitely not. Not only not, I hope the mosquito dies more miserably.

Cold-blooded serial killers are like this. There is no difference between killing people and killing mosquitoes. It is difficult for outsiders to understand.

The complexity of the human brain and the human heart can never be thoroughly studied.

Su Ying's words made the members of the special task force in the conference room feel scared. If it is true, then if Qian Yu is not caught as soon as possible, the consequence will be more victims.

Just compare it with mosquitoes.

How many mosquitoes will a person kill in his lifetime? The number may be about the same as the number of lives Qian Yu will kill in the future. Just thinking about it makes me shudder.

"There is no evidence for this kind of thing, right?" Lu Zhengkai said.

Su Ying: "No, how can there be evidence? It's just research. The research is credible, but it can't be put on the table as one of the evidence chains.

Also, some brain areas determine the individual's sexual consciousness. Once these areas are damaged, behaviors such as pedophilia and sexual violence will occur, which is very consistent with Qian Yu's situation."

Chen Yi said: "From another perspective, this is not Qian Yu's fault."

He was not speaking for Qian Yu. He couldn't even let go of his children. But everything has its beginning and end. If Qian Yu hadn't been beaten in his early years, he would be a normal person.

The conference room fell silent.

Will controls behavior. If the human brain is injured due to surgery, which indirectly leads to a lack of will, then Qian Yu is equivalent to a man-made demon. He cannot control his own choices and is an unprovoked disaster.

But the law will not consider this, and the country will not consider this. There is only one way to deal with extremely dangerous people: disappear.

Born demons, man-made demons, are all demons.

If Qian Yu doesn't disappear, he will make a big noise even if he is locked up forever in prison. He may do violent actions just because of a quarrel or even just because he doesn't like someone.

Now we can explain why Qian Yu is so calm. He may be like what Su Ying said. He doesn't have normal thinking and emotions. The police will come and torture him. He can keep a calm mind even when killing people. Why is he afraid of the police?

Lu Zhengkai said coldly: "If he really has no emotions, why doesn't he dare to admit that he killed people? I don't think he is stupid!"

Even if the world's authoritative expert doctor comes, it is hard to say to what extent Qian Yu's brain is injured. From the process of committing the crime, the suspect has the ability to counter-detection. From the interrogation process, Qian Yu obviously has no attitude of admitting.

This means that he not only has the consciousness of killing without emotions, but also has the intention to escape legal sanctions.

Escaping legal sanctions may be to continue killing.

"Yes, he is very clear-headed in this regard." Chen Yi said, "That is to say, as long as we can find evidence, we can still break through his psychological defenses and get a confession. This is the only way. It is probably impossible to rely on interrogation alone. This guy is probably more durable than our most experienced criminal police."

Lu Zhengkai nodded.

The evidence is the tools used in the crime, including the murder weapon, the clothes worn during the crime, condoms, etc.

"Do you want to check where he bought the condoms?" He looked at Chen Yi.

After the interrogation, it was learned that Qian Yu did not have a girlfriend, so it was meaningless for him to buy condoms, which could be used as a point of interrogation.

The mobile phone was checked, and there was no order record, so it was bought from the store.

Three locations.

The first is Qian Yu's home, the second is Qian Dakang's repair shop, and the third is Qian Yu's school. The possibility of finding it is still relatively high if we visit and investigate around the three places.

Chen Yi did not suggest: "This is not direct evidence, it may not be very useful for Qian Yu... So, I will take people to Qian Dakang's home first, Qian Yu will continue to interrogate, keep in touch."

Lu Zhengkai: "You go in person?"

Chen Yi: "I'm free anyway, I'll go and take a look, give me five technical detectives.

The first search did not collect DNA, this time we need to check the entire bathroom."

Lu Zhengkai immediately understood: "Maybe Qian Yu took a shower after returning home?"

Killing four people in a row, the method used was still violent, Qian Yu could not have no traces on his body, if he took a shower at home, then there might be DNA residue in the bathroom.

The DNA of the four victims, as long as one person is found, it will be evidence.

Chen Yi nodded: "Try it, we can't miss any possibility."

Lu Zhengkai: "Okay, thank you for your hard work, Captain Chen."

...

Soon, the special case team plus the technical detectives, a total of eleven people drove to Qian Dakang's home.

We have already searched once, the second search should pay more attention to details, pay attention to points that are easy to overlook, and can't do it blindly.

Qian Yu's room is the focus.

The five on-site investigators went directly to the bathroom, including the sink, and collected samples from every corner. This is a basic skill for on-site investigation, and everyone is very skilled.

The funds of the special task force are still very sufficient, and the municipal bureau laboratory must also cooperate unconditionally. Moreover, the cost of testing has long been reduced, so there is no need to worry about too many samples.

Cast a wide net, what if you catch fish?

Qian Yu's bedroom.

Qin Fei and the other five stood at the door, and Chen Yi walked in by himself. His goal was very clear, the drawer and the wardrobe.

Drawers and wardrobes are the only two places where things can be hidden. As long as they are not opened, they cannot be seen.

Chen Yi judged that Qian Yu might have brought the tools of the crime back home, and then was discovered by Qian Dakang. After questioning, Qian Yu admitted to the murder.

So, there were those tricks of Qian Dakang afterwards.

The room was not well lit, so Chen Yi took out his mobile phone and turned on the flashlight, carefully checking every corner of the wardrobe and drawers, especially the empty positions.

There must be no obvious traces, otherwise Lu Yongqiang should be able to find them. Now we need to pay attention to the subtle places.

Time passed slowly, and Chen Yi looked very slowly, from the wardrobe to the drawer, and finally came to the bottom of the desk drawer.

He half-lay on the ground, the light and the wooden board were only a few centimeters apart, very clear, and moved slowly like a scan.

Finally, the movement paused at the side board, as if he had discovered something.

Chen Yi changed to a comfortable position, repeatedly confirmed the point less than one millimeter in front of him, and said: "Qin Fei, Han Jun, come here."

The two people at the door immediately entered the room.

"Captain Chen."

Chen Yi sat up, pointed to the small point on the side of the drawer and said: "It should be the point where the tip of the knife pierced. If it is a murder weapon, there may be blood inside the wooden board. You take down the entire board and take it back to the bureau for careful inspection. Be careful not to destroy the traces."

"Yes!"

The two took the order.

Chen Yi left the bedroom and stood at the door waiting.

During the disassembly process, He Shixin said, "If it is a trace left by the murder weapon... Qian Yu took the murder weapon home and put it in the drawer after committing the crime, and planned to find a way to deal with it the next day, but it was discovered by Qian Dakang, is that right?"

Chen Yi nodded: "Yes."

He Shixin: "So with Qian Dakang's intervention, the murder weapon was dealt with that night? He certainly would not allow blood-stained things to continue to stay at home. Compared with Qian Yu, he does not have such a strong psychological quality.

Check all the surveillance cameras nearby that night, maybe there will be some discoveries?"

Chen Yi hummed.

"I'll go to the property management right away." Without being told, He Shixin turned around and left.

Teng Dabin and Su Ying were not idle either, and followed.

The drawer side panels were quickly removed. After the bathroom samples were collected, Chen Yi asked Qin Fei and others to go back to the bureau for testing first, and he went to the property management.

He Shixin and the other two were checking the surveillance.

Surveillance, drawer partitions, bathroom.

As long as there is a harvest in any of the three directions, the case will usher in a breakthrough.

Chen Yi did not join in, but waited on the side, leaving the monitoring room to smoke a cigarette.

About half an hour later, He Shixin paused the video. A car appeared in the still video, leaving the community and heading north.

The north was the direction of Xintou Town.

The time was 3:04 in the morning.

"Captain Chen, I found it." He Shixin said, "We need to go back to the bureau to check the national highway surveillance to see where Qian Dakang went."

Xintou Town has a low urbanization rate, many crop planting areas, and wilderness, which is very suitable for throwing or burying things.

The clues and inferences match.

Driving out at 3 a.m., Qian Dakang couldn't have gone for a drive, and it can be basically confirmed that it was the tool used to deal with Qian Yu.

Check the surveillance along Qian Dakang's driving trajectory. It would be best if he could be photographed parking. If not, lock a rough range based on the time, and then mobilize police dogs to form a huge encirclement and carpet search, and it should be found.

Chen Yi turned around and left: "Collect the team."