Criminal Investigation Notes

In the conference room of Huadu General Administration, Lu Junchi looked away and continued: "All kinds of detailed information about the Xisha case are here. Everyone must work overtime today to read all the previous files of this case to fully understand the case."

When he said this, he paused for a moment and said: "There is still some time before work in the afternoon, Xia Mingxi, you collect the data, Zheng Bai, you and Qiao Ze go to the scene of the crime and take a look, Qu Ming, you go and hand over the groups , understand all the situation clearly. The people in the Xing team are also at our disposal, and you take Shao Lin with you."

Several team members nodded one after another. Lu Junchi's work assignment has always been reasonable and clear.

There are several steps in the general process of solving a crime. First, investigate the crime scene to understand the process of the crime and restore the scene to the maximum extent.Second, determine the tools of the crime and search for various witnesses and physical evidence. Third, lock down the suspects and conduct interrogation.

In these processes, it is necessary to continue to reason, search, and find the motive of the crime.

Lu Junchi added: "Everyone, hurry up and go back today to tidy up. Starting tomorrow, the hotel next to the headquarters has opened rooms, which can be used for temporary rest."

The others went out first, and Xia Mingxi also carried a stack of past files to organize and file.

Suddenly, only Lu Junchi and Su Hui were left in the conference room.

Lu Junchi faced Su Hui and said, "Su Hui, this case..."

Su Hui seemed to know what he wanted to say, and interrupted him: "You don't have to worry about me, I will get up from where I fall. I know some details of this case, but I am more suitable for handling it than others. Moreover, I I hope I can catch the murderer myself." Otherwise, he wouldn't take the initiative to text Lu Junchi, hoping that he would follow.

In the case of the fine sand case in the past, both of them had looked through the files many times, and even the written records in those files were not as detailed as Su Hui, who had experienced it.

Lu Junchi said with a solemn expression, "I found out that the delivery method this time is completely different from the previous delivery method."

Su nodded back and said: "I also discovered this. I think this case is too different from the previous Xisha case, but also has too many similarities. The Xisha case has always been very strange and unconventional... ..."

Whether it was two years ago or two years later, there must be part of the truth in this case that they have never touched.

Su Hui blinked his eyelashes and made a judgment: "About this case, in the past reasoning process, I may have some misunderstandings. In order to avoid misleading you, I hope that this investigation can be based on your thinking. leading."

He has experienced the fine sand case. People always have inertial thinking and preconceived ideas, and they will also enter the maze.Lu Junchi has just come into contact with this case, and he may bring new ideas to solve the problem.

Lu Junchi said: "I have some ideas now, and I feel that we should start with the current case."

After all, the Xisha case is very old, and time will destroy a lot of evidence, but the new case is different, they can find more information.

Su nodded back: "Okay."

The two quickly formulated the direction and basic plan for the investigation.

Since the case has happened for several hours, some video photos, video materials and statements of the uninjured people have been recorded from the scene.

Compared to Su Hui whose eyesight was a bit difficult, Lu Junchi could see faster.

He browsed through it, and replied to Su: "I found that these two cases have one thing in common."

Su Hui looked up: "What?"

Lu Junchi said: "Among the two bus explosions, both occurred after disputes among passengers." He flipped through the statements for comparison, "And both times, female passengers were harassed."

In the previous investigation, Xing Yunhai had already recorded the statement of the person in the vehicle. The bomb was discovered about 10 minutes after the dispute between the passengers, and the man was still in the vehicle at that time.

Because the first explosion did not actually occur, they could not directly link the explosion with this incident.

But if this happened twice, the meaning would be completely different.

Lu Junchi compared the passenger lists on the two buses in his hand, and confirmed that the person who had the dispute was the same person: "The one who molested on the bus was the dead man named Duan Siyuan, and he also appeared on the last bus. "

After he finished speaking, he pointed out the same name on the list to Su Hui.Then Lu Junchi sent the information to Qiao Ze, asking him to check further.

"Two buses, with different routes and different times, but the same person appeared. This person is one of the dead, and he is very likely to be the target." Su Hui squinted his eyes and read the two confessions, "There is also a common The point is that when the female passenger had a dispute with this person, the passengers were indifferent and the matter was left alone, which may be one of the conditions for the crime to occur.”

Lu Junchi nodded seriously: "Then let's follow this person and see if we can investigate."

Information on the deceased was quickly passed on.

Duan Siyuan is 44 years old, 72 meters tall, with dark skin and a little thin.

Judging from the photo, his eyes were a little dull and cloudy.

If you can directly access his thinking, you can find that he is thinking about those things almost all the time...

His whole life was swallowed up by that event.

Desire, endless desire, he became a slave to his body.

The man was one of the dead in the accident, and he had a quarrel with the female passenger before the accident, causing the female passenger to get off the bus in a hurry.

Lu Junchi looked at the information for a while and said, "This man is really disgusting."

The first part of the video has been completely preserved. Duan Siyuan almost chased the girl, using the flow of people as a cover, and the seat arrangement in the car to drive the girl to a corner, terrified and restless, but he has no regrets.

It was this person who finally died in an explosion on the bus. Judging from the photos of the body, there was no complete body.

Su Hui looked at Duan Siyuan's background introduction.

There are three siblings in Duan Siyuan's family. He is the youngest in the family. He has been spoiled by his parents since he was a child.

After Duan Siyuan became an adult, there were several demolished houses in his family. In addition to his own living, he could also collect rent. This person did not work hard and was idle every day.

After his parents died, his sisters didn't get him married, so he just wandered around in those cars, buses, and subways.Even spent more time in those vehicles than at home.

This is a habitual offender with many crimes. The original report was 18 years ago.

But he has intellectual problems, and he is very arrogant, so many people avoid him.

The elder sister of the family took him to issue a mental certificate, saying that his younger brother was mentally ill, his crimes were not serious, and he had never been sanctioned.

After reading the testimony of the witnesses, Lu Junchi patiently called Duan Siyuan's two sisters. They were not sad about the death of their family members. Instead, they felt relieved and kept saying that they would cooperate with the police.

Lu Junchi asked Su Hui: "Is it possible that the suspect who planted the bomb this time was a woman?" He thought that if a woman was hurt by Duan Siyuan's actions, she might take revenge.

Su Hui lowered his head and said, "We can't rule out men who seek revenge for their girlfriends or wives. However, if the target is really Duan Siyuan, this person may be physically weak and in a disadvantaged position."

Lu Junchi entered the system, checked it, and concluded: "I counted, and there are 43 alarm records about Duan Siyuan in our system."

However, these 43 reports to the police did not deal with him in the end. Either a settlement was reached, or nothing happened.

Su Hui said indifferently: "There are far more victims than this. Most of them probably didn't call the police."

Through Duan Siyuan's associated mobile phone number, he found some of his accounts, and even took some pictures of his skirts on it, and publicly posted them on the Internet.

And it seems that although this person is middle-aged, his desire is not diminished, the frequency of releases is very high, and the activities are also very frequent.

Su Hui put his chin on his hands and concluded: "He is a vagrant. He wakes up every day and eats lunch at the door of his house. Then he gets in the car and follows the car to a random place. Sometimes he still can't get enough of it after dinner. On average, there will be at least two to three victims per day."

In other words, there may be nearly a thousand victims a year, and tens of thousands of victims in ten years.

Those who choose to call the police are, after all, only a small number of people.

And Duan Siyuan's behavior may cause those women to suffer substantial harm, make them feel uncomfortable, cry, or even have nightmares, and become afraid of men, and they will not be able to get out after many years.

This kind of thing is terrible and sad, and there are more than one or two men like Duan Siyuan in this city.

There is no way to effectively control this situation.

When Lu Junchi heard this, his brows were filled with anger: "A man who can't control his lower body like this is any different from an animal..."

Su nodded back in agreement: "It should have been eunuched a long time ago."

Lu Junchi collected all the information, and sighed: "There are too many potential victims, and it's hard to follow this line."

He originally thought that by finding out Duan Siyuan, he would be able to follow the clues, but now, he seems to have stepped into a maze.

An old hooligan who casts his net widely, has many potential victims, and it is impossible to confirm who is the suspect for a while.

"In the previous fine sand bombings, those who died were random people. At that time, the murderer did not have this kind of 'justice'." Su Hui covered his mouth and coughed a few times, then asked him, "Duan Siyuan How far is the location of the explosion from the location of the explosion?"

Lu Junchi said: "One row. But the flow of people on the bus is constantly changing. I'm not sure if he has changed seats after the bomb was placed..."

It is not a pity for such a scum to die, but Duan Siyuan is only one of the dead.

He is suspected to be the killer's target.

However, the police are still unable to confirm whether he is the real target of the murderer and can only use these as clues.

Su Hui thought about it intently. There are only two cases related to the bus explosion.

It is only their speculation that the case is related to Duan Siyuan. Maybe the murderer just committed the crime randomly as usual, maybe Duan Siyuan just happened to appear on these two buses.

After chasing here, this starting point is really not easy to continue.

The two of them studied until they got off work at night, and Lu Junchi closed the files: "Let's do this today. Tonight, I'll look at the other records and the on-site inspection. Tomorrow, the special police will have an EOD expert over there, and maybe they can give us some clues."

Su Hui asked, "Do you have any other ideas?"

Now they must race against time to be able to run ahead of the murderer.

Lu Junchi said: "I want to study the sand scattered on the scene."