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

Chen Yi did not go home, because Fang Shuyu needed a quiet environment to rest. He opened a new room in the hotel where Teng Dabin and Su Ying were staying, and prepared to take a nap for a few hours.

After staying up all night, sleepiness quickly came. Before falling asleep, Chen Yi went over the whole case in detail in his mind.

When the time of death of the victims was all known, the process of the case was relatively clear.

Why did the two children and Ji Jingfu die within 28 hours? Of course, they could not die at the same time. No matter how powerful the forensic doctor is, he cannot accurately determine the time of death to the minute and second. It is inevitable that there will be errors.

Twenty-six hours, twenty-eight hours, twenty-eight hours, twenty-eight hours.

The order of death of the four victims is: Ji Jingfu's wife died first, then the two children, and finally Ji Jingfu who returned.

Let's assume that the murderer was not coming for Ji Jingfu.

On the day of the crime, the murderer sneaked into the yard (or knocked on the door) immediately after Ji Jingfu left home, threatened the lives of the two children to force Ji Jingfu's wife to give up resistance, and then tied her up.

Ji Jingfu's wife was taken care of, and the two children were not to be feared, and they could be controlled in a short time (or the two children were taking a nap).

Afterwards, the murderer raped and killed Ji Jingfu's wife first, and then attacked the two children. When everything was over and he was about to leave, he bumped into Ji Jingfu who happened to return early, and the two sides had a fight, and finally Ji Jingfu was stabbed four times (or the murderer did not leave the scene and waited for Ji Jingfu to return).

The only physical evidence clues left in the whole process were the clothing fibers under Ji Jingfu's fingernails.

The current investigation is under the watchful eyes of Lu Zhengkai, so Chen Yi can think deeper and farther.

Assumptions are terrible.

Assuming that this case is the beginning of a serial case, what will happen in the future? More women or children are killed, and the murderer's methods of committing crimes are becoming more and more skilled, from four knife kills to one knife kill, and the scope of the crime spreads from Xintou Town to the whole Yangcheng.

Chen Yi is not imagining, this possibility is absolutely there, because the murderer can be cruel to the children, which shows that this person does not have empathy, is cold-blooded and indifferent, and lacks emotional perception.

Lack of empathy is one of the important characteristics of serial killers. It is difficult to stop after the first time.

"If it is a series of cases, the murderer will generally not choose an unfamiliar area for the first crime, nor will he choose a completely unfamiliar target. At least he must have seen it before, so his residence is within three kilometers of the crime scene."

"Three kilometers..."

The map flashed in his mind, and Chen Yi could see Xintou Town and the national highway outside Hongzhong District.

In the dynamic picture, buildings rose from the ground, and roads extended like lines to separate the buildings. Pedestrians and vehicles appeared out of thin air, and the silent bustle could be seen from a bird's eye view.

The location of the crime was like a bright moon in the night, always bright in the picture, and the line extended out and spread within three kilometers. Every building at the end of the line could be the suspect's residence.

"The person who is with the child every day is Ji Jingfu's wife. The place where the three people appeared many times is likely to be the daily activity range of the suspect."

"Although the person is dead, we can roughly restore it through monitoring and visits, but we cannot judge the suspect's significant features. Serial killers are usually very camouflaged."

When the map disappeared and the child's body appeared in his mind, Chen Yi suddenly felt uneasy. This case must be solved as soon as possible.

When he opened his eyes, the time came to eleven o'clock in the morning. Chen Yi sat up from the bed and found his mobile phone to check. There was no missed call.

At this moment, the visit work has been going on for several hours.

After washing and going out, the special case team gathered. After having a casual lunch, the six people rushed to the Municipal Bureau.

Lu Zhengkai was in good spirits. I don't know if he had slept. As an experienced old criminal policeman, staying up late is also experience. This is only the first day. The fatigue is not enough to reach the edge of the outbreak. The entire task force is currently in the most passionate stage.

However, as time goes by, everyone will only get more and more tired, which is one of the reasons for the golden 72 hours of solving the case. Not only are there fewer and fewer visible clues, and the suspect's mentality is becoming more stable, but the fatigue of the investigators will also cause the breakthroughs that should have been discovered to slip away due to mistakes.

Chen Yi brought a cup of coffee to Lu Zhengkai, and the other party was not polite and drank half of it directly like drinking water, and then said: "Captain Chen, the suspect spent a long time on the two children. From the autopsy report, the traces left are more than Ji Jingfu's wife, which shows that in his eyes, children and adult women are different...

To put it bluntly, he is more interested in children than adult women, which is not a good sign."

After speaking, he glanced at Su Ying, thinking that the special case team forensic doctor had dictated the autopsy report to Chen Yi a few hours ago.

Chen Yi nodded: "Even if it is revenge, he has serious pedophilia tendencies. This kind of disease cannot be cured, and can only be alleviated through psychological treatment and drug treatment. If this person is not found as soon as possible, there is a high probability that new cases will occur.

This is no longer as simple as a vendetta. The murderer himself is a very dangerous person."

Lu Zhengkai looked back at the electronic map on the big screen and said: "Captain Chen, I feel that the murderer is active near Ji Jingfu's home. He is either a resident of Xintou Town or a resident of Hongzhong District. What do you think?"

Chen Yi: "It is quite possible. How is the investigation of Ji Jingfu's wife?"

Lu Zhengkai shook his head: "A full-time mother with simple social relations. All the data in the mobile phone have been checked and no abnormalities have been found.

She has two children with her, so she shouldn't have the time to go out and make enemies, unless it's a grudge from her early years. "

Chen Yi said: "Lu Zhi, the matter of Ji Jingfu and his wife can be slowly investigated by the people below. The most urgent task now is to find out who Ji Jingfu's family has been in contact with recently.

Why did the murderer choose to act when Ji Jingfu's family was about to leave Yangcheng? This issue should be taken seriously and not treated as a coincidence, so the visit work is very important. "

When mentioning this matter, Lu Zhengkai asked: "Captain Chen, if the murderer acted because Ji Jingfu's family was about to leave Yangcheng, how did he know that the other party was leaving? Ji Jingfu shouldn't mention it to others, right?"

Chen Yi said: "The child may mention it."

Lu Zhengkai: "That's right, the school can't be ignored. "

Although Ji Jingfu could run away at any time, the two children's studies were not neglected. They might have asked for leave or skipped classes on the day of the incident.

There are police officers who are responsible for visiting the school, and no news has been received yet.

It was afternoon, exactly 24 hours after the incident.

Zhuo Yun called.

As the deputy commander of the Criminal Investigation Detachment, he led the investigation of this case and has been active in the front line of the investigation from early morning to now, without a moment's rest.

"Lu Zhi, there is a discovery." The voice sounded in the speaker, and the phone turned on the hands-free mode. "In the past month, Ji Jingfu's vehicle has been maintained once and repaired twice in a nearby repair shop. The owner of the repair shop is Qian Dakang."

Lu Zhengkai and Chen Yi looked at each other.

They knew Qian Dakang. Qian Dakang played a key role in the Economic Investigation Detachment's ability to lock on Ji Jingfu, the suspect in the invoice buying and selling case.

Qian Dakang's shadow can be seen in both cases, and one cannot help but wonder if there is a connection between them.

Lu Zhengkai: "Did Ji Jingfu go there by himself? ”

Zhuo Yun: “Qian Dakang said that Ji Jingfu went to the store by himself three times.”

Lu Zhengkai asked: “Do you have an alibi?”

Zhuo Yun said: “There is no sufficient alibi. On the day of the incident, Qian Dakang and his wife said that they were busy in the store, but no customers could prove it. Because the two orders in the store that afternoon required a long time to repair the car, the car owner did not choose to wait in the store.

Lu Zhi, I think Qian Dakang has a big problem. The surveillance in his store has been broken for half a month. Is this a coincidence?”

Lu Zhengkai: “Check the nearby surveillance to see if he left when the incident happened. Also, arrange two people to monitor him secretly. ”

There are three purposes for secret surveillance: one is to prevent the suspect from escaping, the second is to prevent the suspect from destroying physical evidence, and the third is to observe whether the suspect has any abnormalities.

When new clues point to Qian Dakang as a major suspect, the task force will carry a search warrant to search the repair shop. For example, if the surveillance camera captured Qian Dakang lying, he was not in the repair shop at the time of the crime.

Chen Yi observed the map. Qian Dakang's repair shop is very close to Ji Jingfu's house, within a range of three kilometers, and there are many small roads that can reach Ji Jingfu's house, and it is not necessary to take the national highway.

Local people like Qian Dakang must be very familiar with the surrounding terrain and know how to completely avoid police investigation.

"Qian Dakang? I didn't expect to involve this person." When Lu Zhengkai hung up the phone, Chen Yi said, "I have to call Old Tang back to talk."

Lu Zhengkai: "Well, I'll talk to him."

More than half an hour later, Tang Hongyi came to the meeting room. He was a little surprised to learn that Qian Dakang had entered the sight of the task force: "Qian Dakang? He may be related to this case? When I went to find him, this guy didn't want to say a word. "

Tang Hongyi was exhausted. He took out a cigarette and lit it while talking. Maybe he was in a hurry, so he was slightly out of breath.

Chen Yi asked Qin Fei to pour him a glass of water.

"Thank you." Tang Hongyi drank it all in one gulp.

Lu Zhengkai asked: "Is there anything unusual about Qian Dakang?"

Tang Hongyi recalled: "No, right? He was an intelligence dealer in his early years, but he has quit because his son was beaten into the ICU. He was so scared that he immediately retired and lived a stable life."

"Oh?" Lu Zhengkai immediately grasped the key, "His son was beaten into the hospital?"

Tang Hongyi nodded: "Yes, he almost died."

Lu Zhengkai: "Is it possible that this matter has something to do with Ji Jingfu?"

Tang Hongyi was stunned: "This... I don't know about this, it shouldn't be possible? The person who beat him has been arrested, and the instigator has also been confessed, and Ji Jingfu's name is not among them. "

In order to get information from Qian Dakang, he even went through the files of the intentional injury case, but it was useless. No matter how he tried to persuade him, Qian Dakang was unwilling to help.

In the end, he still brought up Chen Yi's name to ask Meng Yi for help, and then locked Ji Jingfu.

Lu Zhengkai thought about it and looked at Chen Yi: "What do you think, Captain Chen?"

At this moment, Chen Yi was reshaping his judgment of the case based on new clues. Did he kill Ji Jingfu's family to avenge his son? Even the children were not spared? It seems a bit far-fetched, but it is still possible.

In other words, Qian Dakang was not seeking revenge, his target was the mother and her two children.

"We need to understand Qian Dakang from the side first." Chen Yi said, "There is a problem here. If Qian Dakang's son was beaten and it was related to Ji Jingfu, how did Qian Dakang know? Did the attacker not fully explain? Why did he do it today? "

Lu Zhengkai is a man of swift action. He will investigate any doubts. He took out his cell phone and called the police officers below to assign police forces to question the suspects of the intentional injury case that year. Even if both parties know each other, they must take it seriously.

Putting down his mobile phone, Lu Zhengkai said: "Maybe it was a dual motive? Ji Jingfu played a role in promoting the beating of Qian Dakang's son. Qian Dakang met Ji Jingfu many years later. He would kill anyone anyway, so he chose Ji Jingfu to vent his perverted desires. , also took revenge."

Chen Yi said nothing and turned to look at Tang Hongyi.

Tang Hongyi frowned and said: "It feels like... Qian Dakang doesn't look like a pervert. I didn't find anything suspicious. Uh... don't listen to me. Let's check carefully, just in case. ?”

Zhuo Yun's investigation soon yielded results, and he called again, saying that Qian Dakang was not photographed leaving the store during the incident.

Lu Zhengkai zoomed in on the map. There were many small roads in Xintou Town. Qian Dakang did not necessarily have to take the national highway. Since the surveillance camera did not capture him, his suspicion could not be ruled out.

Tang Hongyi stood up and came to the big screen and said: "In the early years when the national highway toll station was still there, many drivers would take detours to save money. Look, if you take this road in this place, the surveillance will definitely not be able to capture Qian Dakang. ”

Lu Zhengkai hummed and said to the phone: "Go to the nearby alleys and take a look. If you find private surveillance, investigate it."

Nowadays, surveillance is popular among all people. You can buy it online for tens of dollars. There are many people who like to install surveillance probes. Private surveillance is also an important source of clues for the police to investigate cases. The premise is that the owner agrees. Generally, as long as there is no secret, it will not Deny the police request.

Zhuo Yun: "Okay."

After hanging up Zhuo Yun, Lu Zhengkai continued to issue orders to other investigation teams. During the visit, he asked Ji Jingfu and Qian Dakang whether they knew each other in their early years and tried to find the intersection.

At this time, Chen Yi asked He Xin: "Lao He, if he deliberately destroyed the surveillance and deleted the surveillance video, can he find out?"

Shi Xin replied: "It depends on the method. If you are not an expert, you can find it out."

Chen Yi: "You take Qin Fei and the others there and say that a major case has occurred. I hope you can repair the surveillance system for free and assist the police in investigating the case. This will only benefit him and not harm him. If you refuse..."

Having said this, he looked at Lu Zhengkai.

Lu Zhengkai said immediately: "If you refuse, apply for a search warrant to conduct a thorough investigation to see what secrets are hidden in the repair shop."

"I'll go right away." He Xin stood up and took Qin Fei and the others out of the conference room.

In the conference room, Chen Yi raised a new question: "What's going on with Ji Jingfu's car? Has it been repaired twice a month?"

This is a strange point. He has seen that car before, and its appearance and model are quite new.

Lu Zhengkai: "What does Captain Chen mean?"

Chen Yi: "Let a professional take a look."