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

Municipal Bureau.

Meeting room.

All those who could help had gone to help, leaving only Chen Yi, Lu Zhengkai and Zhou Yebin in the meeting room.

All they had to do was wait.

Zhou Yebin paced back and forth in the room, standing in front of the window for a while, and then returning to the table. His expectation for the result made him a little anxious.

The same was true for Lu Zhengkai. After a long silence, he took out a cigarette from the cigarette box and handed it to Chen Yi, saying, "Is there really blood residue in the dent in the drawer?"

If blood can be extracted and the owner of the blood is from the victim, then it is ironclad evidence, enough to pry open Qian Yu's mouth.

Chen Yi took the cigarette: "I can only say that it is possible."

When he just returned to the Municipal Bureau, he went to the technical investigation to see it. Through a preliminary observation with a high-power magnifying glass, he could see that there was a dark red color in the dent. If nothing unexpected happened, it was completely coagulated blood.

The premise is that the dent was caused by the murder weapon.

At present, it is all speculation. The facts need to be verified by the laboratory, which should not take too long.

The samples collected from Qian Dakang's bathroom were also sent to the laboratory. DNA was extracted from each sample. If a match with the victim was found, it could be used as one of the evidence chains.

But compared to that pit, the possibility of gaining something was not great. After all, he did not take off his clothes to commit the crime. The test was only to prevent accidents, such as the blood splashed on his body during the crime accidentally penetrated into the clothes and remained on the surface of the body.

On the other side.

He Xin quickly locked Qian Dakang's driving trajectory through surveillance. He lost his trace when he was almost at the junction of Hongzhong District and Xintou Town.

The surveillance showed that Qian Dakang turned right into the small road.

He was originally from Xintou Town, and the location of the repair shop was not far from Xintou Town. It can be said that he had never left the area within a radius of five kilometers in his life, and he must be very familiar with the surrounding environment.

When he went out, he should have thought about where to deal with the murder weapon.

After confirming that the surveillance could no longer capture Qian Dakang's car, He Xin fast-forwarded the video to get the time when the other party returned. Forty minutes had passed in between.

Now, we have to judge whether Qian Dakang threw the things away or buried them.

"According to normal people's logic, of course it is safest to bury them. If you just find a place to throw them away, they will be picked up by passers-by sooner or later."

He Shixin restored the road conditions based on the satellite map and calculated the speed of the car. There is a big difference between burying small items and burying corpses. It won't take long. Just find a relatively safe place to dig a pit and bury some soil. It will take about... 20 minutes to get it done.

In other words, Qian Dakang's car drove on the road for about 20 minutes.

According to the speed of the car, He Shixin immediately ordered all investigators to set off, and all the police dogs that could be mobilized were mobilized to conduct a carpet search of the ground in the area.

"Don't have blind spots! This is very important evidence! Do you understand?!" At the door of the Municipal Bureau, He Shixin made the final mobilization.

All police officers: "Yes!"

The vehicle started, the police lights flashed, and more than a dozen police cars quickly rushed to Xintou Town.

It is now evening. More than fifty hours have passed since the murder of the family. The task force is still moving very fast. At present, Qian Yu has been identified as the suspect and the time to solve the case is controlled within 72 hours.

To some extent, this depends on Qian Dakang's tricky operation.

If he had not destroyed the surveillance of the repair shop, the task force would not have suspected Qian Yu so quickly. At that time, the visit work had just begun. Even Chen Yi could not have suspected an ordinary repair shop on the national highway for no reason, even if Ji Jingfu had been there three times in a month.

Qian Dakang is not the murderer, and there is no way to find anything even if there are doubts. Therefore, if the task force wants to find Qian Yu, it will take a long time, and Qian Dakang has greatly shortened this time. He is too smart.

Many criminal suspects are like this. In order to get away with the crime, they like to play cat and mouse games with the police, but they don't know that the more they do, the more mistakes they make.

The police are not afraid of interfering clues, but they are afraid of having no clues.

Xintou Town.

Crop planting area.

The moonlight poured down on the open field, adding an unusual touch to the orderly search operation. Dozens of police dogs, led by their respective trainers, started from the periphery and launched an intensive search of the front area.

There were fewer German Shepherds, but more Springer Spaniels.

Springer Spaniels have a highly sensitive sense of smell. In search work, they are often the first choice and are widely used in bloodstain search, drug search, bomb search, search and rescue, etc. They can often be seen in large-scale security inspections across the country.

Time passed by minute by minute, and the encirclement slowly narrowed. A Springer Spaniel suddenly stopped, sniffed the air rapidly with its nose, and then barked.

"Captain He!"

The abnormal behavior caused the trainer to be highly alert, and he immediately called He Shixin.

He Shixin led people to quickly surround him and said only one word: "Dig!"

The Springer Spaniel seemed to understand and immediately used his claws to dig up the surface soil, but He Shixin's order was not given to it.

The trainer pulled his partner away, and three police officers stepped forward, picked up tools and began to dig the soil carefully.

The police officer felt the first shovel, and the resistance from the palm was not great. This was new soil, and it was likely the place where Qian Dakang buried something.

As the digging went deeper, a black plastic bag appeared in the police officer's field of vision.

The excavation work stopped immediately, and several police officers squatted on the ground and used their hands to dig, and finally took out the entire black plastic bag.

The plastic bag was damaged, and the damage was caused by the sharp blade. The tip of the dagger could be seen piercing the bag and exposed, with a color that excited everyone.

Bloodstains!

Seeing this scene, He Shixin breathed a sigh of relief, and the case finally ushered in a major progress.

"Take it back, be careful, and hand it over directly to the technical investigation."

There are currently no conditions for inspection. It is very likely that Qian Dakang's fingerprints are left on the plastic bag, and it needs to be sent to the Municipal Bureau for further processing.

Municipal Bureau.

After receiving the news, Chen Yi and the other two immediately left the meeting room. Under the gaze of everyone, the gloved technical investigation police slowly opened the black plastic bag in front of them, and what came into view was a set of clothes and a knife.

Continue to turn over, there are also shoe covers and gloves, even masks.

As the task force judged, the suspect wrapped himself very tightly when committing the crime, which led to the on-site investigation not finding any directional clues at the scene.

The clothes were black, and the knife was exactly the same as the fruit knife purchased by the task force before. It was covered with blood. Qian Dakang did not choose to clean it before burying it.

This might be the first time he experienced such a thing, and the murderer was his own son. You can imagine how terrified he was at that time. He had no time to think too much. All he could do was to make these things disappear from his sight as soon as possible.

Qian Yu returned home before ten o'clock, and Qian Dakang went out at three o'clock in the morning, with a gap of five hours.

Five hours, minus the time when Qian Dakang found the murder weapon, the father and son should have had a long conversation.

As for whether Qian Dakang's wife knew about this, it is not clear for the time being.

"Be sure to check carefully!" When he saw the murder weapon, Lu Zhengkai gave an order, "Fingerprints and DNA, there must be no omissions!"

There is more good news.

The time came to ten fifty in the evening.

The side panel of the drawer has made progress in the detailed extraction work. There are indeed bloodstains on it. After DNA comparison, it comes from the victim Ji Jingfu and one of Ji Jingfu's children.

There are only two people.

There is nothing strange about this. The murderer used two methods of killing when committing the crime. One is cutting the throat, and the other is stabbing from the front. When cutting the throat, it is possible that the tip of the knife was not touched, but stabbing would definitely leave blood.

With the ironclad evidence, Qian Dakang and his son were immediately taken to the interrogation room and interrogated at the same time.

Qian Yu was personally in charge of Lu Zhengkai.

"Qian Yu! Did you kill Ji Jingfu's family of four?!" Lu Zhengkai stood in front of Qian Yu, pointed at his nose with the rolled-up medical report in his hand and asked coldly.

Qian Yu looked up and looked at Lu Zhengkai. The 21-year-old college student still had the immaturity and inexperience on his face. Facing the question, he calmly said: "No."

"No?" Lu Zhengkai was furious and threw the medical report directly on Qian Yu's face, "Still talking to me! A family of four, including two children! How the hell did you have the heart to do it!!"

The medical report slipped off Qian Yu's face, fell on the board in front of him, and unfolded by itself.

Qian Yu looked down expressionlessly. Although the edge of the paper was bent and the details could not be seen, the content displayed did not affect reading.

There was obvious surprise on his face.

"Did the knife touch the drawer?" Qian Yu said to himself.

Lu Zhengkai shouted: "Did you kill the person?!"

Qian Yu did not answer immediately. He picked up the inspection report in front of him with both hands and slowly unfolded it, and then folded it into a paper airplane under the gaze of everyone.

Holding the paper airplane in his hand, he closed one eye and aimed at Lu Zhengkai, and the next second he let it go.

Whoosh!

The paper airplane hit Lu Zhengkai's chest, followed by his laughter: "Haha, I killed him, can you keep your voice down?"

"Fuck! You fucking..."

Lu Zhengkai was furious. He had never seen such a cold-blooded suspect, and he immediately took action.

"Lu Zhi Lu Zhi... calm down!" Zhuo Yun quickly stepped forward to grab him, but it was a little too late. Lu Zhengkai's foot had already kicked Qian Yu's body, and most of the force was removed, "Lu Zhi!"

Others also came to help, and the scene was a bit chaotic.

Chen Yi and Zhou Yebin were not there, they were in the observation room.

"This bastard is really emotionless." Zhou Yebin's face was equally ugly, he didn't care about Lu Zhengkai's behavior, if he was in the interrogation room, he probably couldn't help it.

Not to mention Chen Yi, for such a person, he prefers to kill him directly at the scene of arrest, so as not to waste the manpower and material resources of the procuratorate and the court, and waste the drugs for injection or bullets for execution.

"Haha."

Before Chen Yi could speak, Qian Yu in the interrogation room laughed, as if he thought the scene in front of him was very interesting.

He had no fear.

Even if he had confessed, even if he knew his fate, he had no fear.

The previous judgment should be correct. If this guy is not caught in a short time, then Yangcheng is likely to continue to die.

Serial killers have growth potential, and it will only become more and more difficult to catch in the future. The modus operandi will become more cruel after self-updating.

This time, the task force has strangled a future serial murder case in the cradle.

"Zhuo Yun, you interrogate, let Lao Lu go out first!" Zhou Yebin gave instructions.

Lu Zhengkai left the interrogation room, quickly opened the door of the observation room, and stood next to Chen Yi and Zhou Yebin, with anger on his face.

"Little bastard!"

Lu Zhengkai cursed again.

Chen Yi patted him on the shoulder to calm him down. The other person had lost control of his mood just now. Qian Yu deliberately provoked him. Of course, the main reason was hatred, regret for the death of the four people, and regret for the death of the two children. .

It can only be said that a society governed by the rule of law has saved many scumbags.

"Why kill them?" Zhuo Yun's voice sounded in the interrogation room.

Qian Yu still had a smile on his face: "Why? No reason, just kill him if you want."

Zhuo Yun gritted his teeth, suppressed his anger and said, "Have you known them before?"

Qian Yu: "I don't know him. I've seen him before. I've seen him several times. I've seen him in the repair shop and in Xintou Town."

Zhuo Yun: "How many times have we met in the repair shop?"

Qian Yu: "Three times."

Zhuo Yun: "Did you do the trick on Ji Jingfu's car?"

The car that had been maintained had problems twice in a row. The task force has never forgotten this suspicion. If the inspection did not find any problems, they could only ask the suspect.

Qian Yu smiled: "You are quite smart. Yes, those two children are quite cute. If I do something, won't they have to come and repair the car?"

cute?

The scene of the victim's death appeared in Zhuo Yun's mind, and he suddenly felt a fire rushing to his forehead. He stood up quickly, as if he wanted to do the same thing as Lu Zhengkai.

"Zhuo Yun! Calm down! Just don't treat him like a human being! Continue the interrogation!" Zhou Yebin reminded in the observation room.

No matter how stable the psychological quality of the police is, they are just normal people. Faced with a lunatic like Qian Yu, it is difficult to remain calm as they should be.

Zhuo Yun took a deep breath and sat back slowly.

"How do you know when Ji Jingfu will come to repair the car?" he asked.

Qian Yu: "I don't know, I'm just trying my luck. It turns out that I was lucky. I met this family twice when I went home. I even brought them gifts."

The two children would not have thought that the big brother with a warm smile would suddenly one day turn into a devil who tortured them.

The interrogation went on normally, but Qian Yu didn't play any tricks anymore. Knowing that he couldn't escape the crime, he told the truth as if he were telling a story.

The murder plan had been planned for a long time, and he had placed the crime tools at his grandma's house in advance because his grandma's house was very close to Ji Jingfu's home.

On the day of the incident, he left school and went to his grandmother's house. He jumped out of the window with the crime tools he had prepared and left them outside when he returned.

At nine o'clock in the evening, I went home carrying the crime tools.

"Do you think you are a master criminal after reading a few novels and watching a few movies?" Zhuo Yun said coldly.

Qian Yu smiled, pointed at the paper airplane on the ground and said, "That was probably left by my dad hitting a knife when he was looking through the drawer. If my dad hadn't helped, you wouldn't have caught me so quickly, right?"