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

Chapter 640: Qian Dakang is basically ruled out as a suspect

meeting room.

Chen Yi's words changed the current approach to handling the case.

The police checked the repair shop's surveillance to determine whether Qian Dakang had sufficient alibi. Assuming that Qian Dakang was not the murderer in this case, if the surveillance was intact, he would have been captured in the repair shop at the time of the crime and had never left.

Without the time to commit the crime, there is of course no suspicion of committing the crime.

If Qian Dakang wanted to increase his suspicion of committing a crime and disrupt the police's investigation, he had to prevent the police from seeing the complete surveillance of the repair shop. Deliberate damage was a simple and safe way to do so.

As to why this is done, the answer is obvious.

Chen Yi said, "A case of parents taking the blame for their children happened in Yangcheng a few years ago. That dismemberment case caused a big sensation and social impact. When I was investigating, I didn't expect the suspect to have so many tricks up his sleeve. This case gives me a very similar feeling to that case.

At present, Qian Dakang has not admitted to the murder. As long as there is suspicion, I think...if Qian Yu becomes the main suspect, he should confess immediately. "

Lu Zhengkai: "In other words... the murderer is Qian Yu, and he wanted to avenge himself?"

Chen Yi said: "It's not necessarily revenge for myself. There was something wrong with the drinking between Zhang Menhai and Qian Dakang. It was a bit coincidental and deliberate. Zhang Menhai mentioned that Qian Dakang seemed to be deliberately forcing him to drink while they were drinking.

When people are severely drunk, their memory is fuzzy and their thinking is confused, but they still have an impression of what they heard and can remember it with a little reminder. This may be Qian Dakang's purpose.

Damaging the surveillance footage not only provided the police with enough time to commit the crime, but also gave them an additional motive to commit the crime just in case.

Now that we have the time and motive for the crime, Qian Dakang is increasingly suspected. In this case, we will shift our focus away from Qian Yu."

Lu Zhengkai thought thoughtfully: "Taking advantage of Zhang Menhai's drunken state to force him to instill non-existent memories? Is there such a thing?"

Chen Yi: "Of course direct indoctrination won't work, there are risks, you need to change the concept and pay attention to the method and approach, for example, tell Zhang Menhai that you knew about this before, but just forgot it.

So, when questioned by the police, Zhang Menhai would only say that he seemed to have heard it, but he couldn’t remember when he heard it or who said it to him.

Lu Zhengkai pondered, judging the possibility of this speculation.

As Qian Yu's suspicion continued to increase, Qian Dakang's behavior did begin to reveal strangeness, and there was a possibility of clearing his son of suspicion, unless the two committed the crime together.

"It would be great if there was a way to eliminate Qian Dakang's suspicion of committing the crime." Lu Zhengkai said to himself. As Chen Yi's special consultant to the task force, his opinion should be considered seriously, and ultimately it all depends on the evidence.

The room was quiet for a while, and Chen Yi said, "Bring the interrogation video of Qian Dakang here, so I can take a look."

A police officer left quickly, brought a laptop computer, placed it on the table in front of Chen Yi, and retrieved the video file.

Chen Yi looked at it slowly.

The direction of this case has been determined. Anyway, the problem lies with Qian Dakang and his son. Now is the stage of pursuing details. Everything that has been done must leave traces. Neither Qian Dakang nor Qian Yu can handle all the clues cleanly.

Lu Zhengkai stopped talking and repeatedly looked through the submitted investigation report, looking for any overlooked points.

Half an hour later, the police officer who was responsible for purchasing the same knives as those from Qian Dakang's family returned.

This set of knives is not available in physical stores. The task force contacted the local e-commerce company directly and got them from the e-commerce company’s warehouse.

After comparison, they are exactly the same, with no difference.

Lu Zhengkai took the photo to confirm it again. After it was correct, he had someone send the fruit knife to the forensic room.

The feedback came back very quickly. Judging from the wound, it was caused by this knife or a knife of the same shape and size, there was no doubt about it.

But this cannot be used as evidence.

A knife was missing from Qian Dakang's home, and Qian Dakang could not explain where it had gone. In addition, his destruction of surveillance and his attitude towards interrogation made it certain that he was involved in this case.

Either the murderer or someone who knows about it.

"Chen..." Lu Zhengkai was about to speak, but seeing that Chen Yi was watching the video seriously, he did not interrupt him and turned around to give an order, "Go and tell Zhuo Yun to bring Qian Yu back to school immediately to cooperate with the investigation. Be careful about the method and try not to expose your identity as a police officer, and don't cause any confusion."

The police officer took the order: “Yes!”

Sitting in front of his laptop, Chen Yi pressed the back button and began to watch the interrogation process for the third time.

Qian Dakang is a very cautious person with a stable mental state, which may be related to his identity as an intelligence broker in his early years.

It is very easy to offend people in the business of intelligence broker. After selling intelligence at noon, someone might come to your door with a knife in the evening. You need some skills to succeed.

Not only do you need to have ability, you also need to have a certain prestige so that everyone around you dare not touch you easily.

This is similar to the know-it-all in martial arts novels. If you know so many things about others, you will definitely be targeted. Saving your life is more important than making money. In order to make money, you have to have a life to spend it.

"Ok?"

At a certain moment, Chen Yi pressed the pause button. At this time, Qian Dakang was sitting on the chair in the interrogation room with his right fist clenched, but the finger surface was uneven and the middle finger was obviously slightly raised.

After thinking for a moment, Chen Yi rewound or fast-forwarded according to his memory, found five scenes of Qian Dakang clenching his fists, and took screenshots of them one by one.

Comparing the five screenshots, it was found that Qian Dakang's middle fingers were all raised when he made a fist. This is not a coincidence.

The arc of the head is very different from that of normal people.

"I'm going out."

After discovering this, Chen Yi thought for a moment, and adhering to the principle of not letting go of any possible case, he stood up and left the meeting room.

He walked through the corridor and stood in front of the door of the detention room. Qian Dakang was sitting there with his head down, not knowing what he was thinking.

There are police officers standing guard at the door.

For detained persons, the police need to send people to watch over them in shifts 24 hours a day. The suspects cannot be out of their sight for even a second to prevent them from taking extreme actions.

Of course, the detention room is full of anti-collision materials and there is no possibility of sharp weapons. Suicide is impossible, unless you bite your tongue and try your luck to die.

There is no scientific basis for biting the tongue to commit suicide. The consequences are at most massive blood loss, blockage and suffocation, and neurogenic shock. As long as rescue is timely, you will definitely not die.

"Open the door." Chen Yi said.

"Yes!" The police officer first stood at attention, then took out the key and opened the door of the detention room.

Chen Yi walked in.

Hearing the noise, Qian Dakang, who was sitting there, raised his head and spoke first: "Captain Chen."

Chen Yi stood in front of him: "It seems you know me."

Qian Dakang gave a rather forced smile: "Of course I know him. Everyone in Yangcheng knows Captain Chen's name. I talked about you with Lao Meng when I met him some time ago."

As he spoke, he stood up out of politeness, and the two of them were half a meter apart.

"Really? Let's shake hands." Chen Yi stretched out his right hand.

Qian Dakang was stunned for a moment, not understanding what was going on, but he still reached out and shook hands with Chen Yi.

Chen Yi felt the strength of the other party's five fingers and said, "Use force."

Qian Dakang was surprised: "What?" Chen Yi: "Just use your strength, don't hold back."

"Okay..." Qian Dakang didn't know what the other party wanted to do, so he increased his strength.

In an instant, the power of an adult man came through Chen Yi's palm and entered his brain, and he had already determined the answer.

After a while, the two let go of each other's hands.

Chen Yi recalled the photos in the autopsy report. There were strangulation marks on the necks of the two children. Although the marks were not particularly obvious, they were enough to determine certain facts.

"Come sit down, let's talk." He sat down first.

Qian Dakang was in awe of this rumored figure, mainly because he was so famous that even Meng Yi was willing to go through fire and water for him, so he would not allow him to be underestimated.

When he saw Chen Yi in the interrogation room a few hours ago, he was frightened.

The two parties sat down. Chen Yi stared at Qian Dakang for a while and said, "Does the death of Ji Jingfu's family have anything to do with you?"

Qian Dakang replied subconsciously: "It doesn't matter, it really doesn't matter, I don't even know him."

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Chen Yi nodded: "I believe it."

These two words couldn't stop Qian Dakang from getting into trouble. In fact, he had already prepared himself mentally.

If no clues were found, Captain Chen would not have come to see me in person.

"Uh...thank you." After holding it in for a long time, Qian Dakang felt that he should say thank you.

Chen Yi continued: "Since it wasn't you who did it, based on the clues we have so far, it can only be Qian Yu."

Hearing this, Qian Dakang's face suddenly changed, and he quickly said: "It has absolutely nothing to do with Qian Yu! He is still a child, how could he..."

"Qian Dakang." Chen Yi interrupted him, "He's already a junior in college, 21 years old, and you say he's a child? I've dealt with murderers younger than him. Crime knows no age."

Qian Dakang didn't know how to refute and panicked: "Captain Chen... No, no, no, it's definitely impossible. Xiaoyu is just a... student, just a student. It's impossible for him to know Ji Jingfu, and there is no reason for him to kill Ji Jingfu's entire family. You are very insightful, so don't say anything nonsense!"

Chen Yi sighed, "Qian Dakang, you are a smart man. You should know that the police have basically confirmed that you and your son have serious problems. If you have to choose one of the two, who do you think you should choose?"

Qian Dakang opened his mouth and was about to say something when Chen Yi's voice rang out again: "Don't say it was you who did it. I know it wasn't you. Even if you admit it, can your confession match the scene? Even if you ask Qian Yu in detail and he can match it, the weakness of your middle finger doesn't match the marks on the corpse."

After hearing the last sentence, Qian Dakang immediately lowered his head and suddenly understood why Chen Yi wanted to shake hands with him just now.

"Injured or sick?" Chen Yi asked.

Qian Dakang: “I…”

Chen Yi waved his hand: "Let's not talk about anything else, just talk about your right middle finger. We can find a doctor to confirm this matter. There is no need to lie."

Qian Dakang was silent for a while, then said, "It's a neurological disease. Not only can I not use my strength, but it's also difficult to bend."

Chen Yi: "So, you weren't the one who killed the person. Two children were strangled at the scene, so they don't match up."

Qian Dakang couldn't help but clench his fist, this time with great force, and it was obvious that the middle finger of his right hand could not be fully bent.

"Are you willing to tell the truth?" Chen Yi said.

Qian Dakang said nothing.

Chen Yi didn't ask a second time and got up and left the detention room.

Bang!
The door of the holding room is closed.

Qian Dakang, sitting there, sighed. As a father, even if he knew it might be useless, he had to try.

In his early years, his son was sent to the ICU because of beating himself, and this incident made him unable to let go for the rest of his life.

He wanted to do his best to make up for what he owed his son, even if the cost was unbearable... he would do it at all costs.

Unfortunately, the police are not fools, and there is no way Chen Yi would let him get away with it.

Back in the conference room, Chen Yi told Lu Zhengkai about his discovery. The latter was shocked. This meant that there was evidence that Qian Dakang was not the murderer of Ji Jingfu's family of four.

"Captain Chen has sharp observation skills. In this case... the murderer must be Qian Yu. But why? Why did he kill Ji Jingfu's entire family? Is what Zhang Menhai said true?" Lu Zhengkai was puzzled by Qian Yu's motives.

Chen Yi denied: "No, I think Qian Yu is no longer a normal person. He was beaten and sent to the hospital, which probably caused him irreversible and huge damage.

I have asked someone to go to the hospital to get the information. Fortunately, the investigation was quick, otherwise there might be more bloodshed in the future."

Lu Zhengkai said seriously: "Is this the beginning of a series of cases?"

Chen Yi nodded: "Yes, Qian Yu has no grudge against Ji Jingfu's family, we can analyze the serial killer's motives.

First of all, there is psychological motivation. Dominating, manipulating and controlling others are common psychological motivations of serial killers. They gain psychological satisfaction through committing crimes and lack empathy and moral concepts.

Secondly, social motivations, due to family or social factors, lead the murderer to take the path of revenge against society.

The third is cultural motivation, such as being influenced by movies and TV series, which leads the murderer to imitate them. Such murderers generally have histrionic personality disorder.

The last possibility is illness or external injury, which is more consistent with Qian Yu's situation. We need to find out what kind of damage the beating incident in his early years caused to Qian Yu, so I asked someone to retrieve the surgical records. "

Lu Zhengkai completely agreed with Chen Yi's words: "It makes sense. A person cannot become a madman for no reason. There must have been a major change in his life. Since it was rape and murder, could it be related to his sexual ability? It caused his psychology to be extremely distorted."

Chen Yi thought about it and guessed, "Maybe, but it doesn't seem like it. Qian Yu is an adult, and a college student. If he killed someone because of his sexual ability, I think his girlfriend should have died first."

Lu Zhengkai thought of other cases: "It makes sense. Similar murders have happened in other cities before. A man and a woman had a one-night stand and checked into a hotel. The man killed the woman because he was laughed at by the woman. This is a great insult to the man."

It is said that you can say a man is poor, you can say a man is ugly, but you can never say a man is not good. This is the bottom line that men cannot accept.

Chen Yi: “The most important thing is that the child was not spared, and Qian Yu’s condition may be even more serious.

We study the medical records first and then meet the person in person.

Also, Qian Dakang obviously knows something, how did he know it? It can't be that Qian Yu took the initiative to tell him, right? "

Lu Zhengkai recalled Qian Yu's movements on the day of the incident.

He went to his grandmother's house first, then slipped away and killed Ji Jingfu's family of four, and then slipped back, and did not leave until nine o'clock in the evening to return to his own home.

When the investigation team found the repair shop, the surveillance had already broken down, so Qian Dakang acted quickly.

This shows that Qian Dakang may have noticed Qian Yu's abnormality on the night of the incident, so he arranged everything quickly before the police and disrupted the police's investigation.

So, how did they judge that Qian Yu was abnormal? According to normal logic, Qian Yu would not take the initiative to tell Qian Dakang that he had killed someone.

"Either there was blood on his body, or he took the murder weapon back home," Lu Zhengkai speculated.

Chen Yi hummed: "Qian Dakang's home needs a second inspection."

(End of this chapter)