civil forensic

Chapter 264 Scarcity

The small building of Changyang Criminal Science and Technology Center is newly built, with steel structure, large glass, beautiful appearance and excellent light.

In the spacious corridor, technicians pass by from time to time, or simply people pass by curiously.

Regardless of the technicians' search, Wan Baoming sat in front of the computer, released the scene map of the 513 case to Jiang Yuan, and introduced by the way:

"This case was considered in advance and guessed to be a vendetta. However, the children of the elderly victim are all out of town and live alone. In fact, there are relatively few factors that attract hatred. Therefore, this direction of investigation was not continued later."

"The second consideration is to ask for money. However, there is no trace of theft in the old man's house. Judging from the traces, the murderer probably did not actually enter the deceased's house."

"The most likely, but the least acceptable criminal motive is random killing... In this regard, the city bureau has been nervous for a while, worried that there will be similar cases again, but fortunately, there is no such case."

"But the case dragged on day by day, and there were still no suspects."

Jiang Yuan listened to Wan Baoming's words, and looked at the pictures of the scene, one by one, but did not respond to him in time.

Wei Zhenguo frowned, looking at the picture as well, and said, "If you kill people randomly, the case is too complicated, the scene itself is weak, and people trampled it back and forth, there is no evidence at all. This case can't be solved."

He was helping Jiang Yuan talk and untangle, and what he said made sense.

Random killings are originally super difficult cases.

If there are traces of passionate murder, then random murder is almost the mold of a perfect crime.

Because killing with passion is without criminal preparation.Therefore, most of the passionate killings in modern society can be traced through monitoring and retrieval, personnel investigation and other methods.

And the real random killing, especially the murder of a murderer with a certain force value, is particularly difficult to solve the case.

In fact, ordinary police officers rely mainly on interpersonal relationships to solve crimes, in addition to DNA, surveillance and mobile phones.

This method is also tried and tested.It can be regarded as a general formula.

It is equivalent to the standard procedure in the process of solving equations.

The standard procedure is most afraid of encountering special circumstances.

Wei Zhenguo didn't care what Jiang Yuan thought, he first went to the difficulty and said:

"In this case, first of all, the contact time between the two parties was short. When the victim opened the door, he was probably stabbed to death by the murderer. The murderer killed the murder cleanly. While taking away the murder weapon, there may be too little evidence left behind. There are no fingerprints, It is estimated that there is no DNA, and the victim is also old, so there is a high probability that he has not reacted, nor has he acted defensively..."

"The murderer's luck is also good. The neighbors are also elderly and don't know how to protect the scene. After the police came, the ground was trampled into chaos."

"This bloodstain has a different meaning from the bloodstain that was analyzed."

Wei Zhenguo now also has a better understanding of Jiang Yuan's ability to do bloodstain analysis, and he can also guess the reason why Jiang Yuan asked for bloodstains, footprints, and comprehensive shooting.

But from Wei Zhenguo's point of view, there was too little blood on the scene.The area of ​​the pool of blood is large enough, but other than that, there are only some sprayed bloodstains and a few dripping bloodstains, compared with the scene where Jiang Yuan had previously reconstructed, there is still a bit of a difference.

Wan Baoming patted his head and said with a smile, "I immediately thought of this case, because it is a relatively well-known case within our Changyang Municipal Bureau. However, if it does not meet the requirements, we will find another case... "

"No need." Jiang Yuan, who had seen almost half of the pictures, said softly at this time, "The basic requirements are all met."

Wei Zhenxue coughed twice, and said, "Jiang Yuan, let's find a suitable case first, make a good start, and then tackle the tough ones."

This is also a strategy they have devised on the road.

For cases, if it is just dry fingerprints or DNA, it can be done in the office.At most, it is to go out of the scene and re-survey once or twice.These tasks can also be done by Jiang Yuan and Wang Zhong together.

Including forensic work, just looking at pictures in the office, dissecting corpses, and looking at microscopes, etc., can almost do a good job.

But when Jiang Yuan really follows a case, it often requires teamwork such as investigation and graphic investigation. If a certain degree of trust is not established, it is unclear whether the Changyang City Criminal Police Detachment can cooperate and how well it cooperates. .

Especially in the investigation, if the investigation is not detailed enough, or there is a problem with the design of the investigation, it is tantamount to abolishing a series of clues.

Jiang Yuan looked at Wei Zhenguo, smiled and said: "The case has been seen here, and it has come here, so let's do it first."

"This..." Wei Zhenguo knew that Jiang Yuan was not reckless, so he blinked and decided to wait and see what happened.

Jiang Yuan smiled at Wan Baoming again, and said: "Let's take a look at this case first, but I'm not sure it's this case. I'll read the pictures of the scene first, and then talk about it."

"Okay. There's no need to fix any case." Wan Bao said clearly, although Huang Qiangmin charges on a case-by-case basis, they are all charged at the county bureau level, so as long as it is a murder case, he can accept it.

Jiang Yuan then continued to look at the photos.

Unlike what Wei Zhenguo thought, Jiang Yuan didn't think this case was very difficult.

This probably has something to do with the skills Jiang Yuan has mastered.Bloodstain analysis is bloodstain analysis. When there are many bloodstains, bloodstain analysis can be used to reconstruct the scene. When there are few bloodstains, it can still be used to analyze and get clues.

In fact, from the perspective of historical evolution, cases such as the "513 door-opening stabbing murder case" were the mainstream serious cases four or fifty years ago.

Of course, stabbing to death as soon as the door is opened is still a little more difficult, but the essence has not changed.

"Didn't you find the vehicle used by the murderer?" Jiang Yuan looked at the picture and asked.

Wan Baoming said: "Probably not. The locality is a remote town with public transportation and many illegal cars. This line should not be investigated. Shall I ask a policeman from the task force?"

"Okay." Jiang Yuan responded in one gulp.

Wan Baoming then went to make a phone call, and came back in a while, saying, "There are still two people in the 513 task force, who have been following them from beginning to end. The one who is here now is Wang Chuanxing, who is in the detachment, and will be here in five minutes."

In theory, the homicide task force does not solve the case or withdraw it.The difference is that the task force during the current case has sufficient resources to bypass other cases and needs.

If the case is solved, then everyone will be happy.If it is not detected, the number of cases will not continue to decrease, but in the end there will always be one or two people working part-time.

These two people are not only responsible for meetings, but also responsible for answering the phone, summarizing clues, sorting out materials, processing documents, receiving victims' families and so on.

The advantage of this is that someone knows the case from beginning to end.When the case resumes, the police officers in charge of the backlog will be able to learn the details of the case as quickly as possible.Especially those details that were not written into the dossier.

While waiting for Wang Chuanxing, Mu Zhiyang and Wang Zhong were brought over.

Wei Zhenguo introduced each other, and let the two stay by the side.

Mu Zhiyang and Wang Zhong behaved like chicks.

The Changyang City Criminal Police Detachment and the name of the Criminal Center have a deterrent effect on the two of them.As for the "random murder case", the two of them had only seen it on TV.

A few minutes later, a policeman entered the door with a box of documents.

"Director Wan." Policeman Wang Chuanxing greeted him.

This is a white and clean young policeman, with a straight body, standing upright, bright eyes, and a well-educated appearance.

Wan Baoming let him sit down with a smile, introduced Jiang Yuan and the others briefly, and said, "Forensic Doctor Jiang has a few questions about the 513 case. See if you understand."

"No problem." Wang Chuanxing put the cardboard box on the table and said, "I also brought some materials of the case... Well, is our case going to be reopened?"

Following a task force for three years, Wang Chuanxing also hopes that the case can be solved.Consolation to the family and relief to all.

Wan Baoming shook his head first and said, "It's still too early for the restart. Let's understand the case first. If we can find new key clues, we will discuss the restart. By the way, forensic doctor Jiang just asked me the question... the traffic used by the murderer Tool, did we find it back then?"

"No." Wang Chuanxing shook his head and said: "The local traffic situation is very complicated. There is also a Manshui River in front of Shunling Township. It is still open to navigation during the wet season for half a year a year. Take some small boats. In addition, the The township enterprise is mainly engaged in wood processing and has a small logistics park. It takes about three to four 10 minutes to walk from the logistics park to the victim’s house, and I walked through it myself.”

Where there is a logistics park, there are carts. In fact, the carts can also carry passengers, especially the carts in the logistics park. Some cargo owners will escort the cart or take a ride.

And no matter whether it is a cart or a small boat, their trouble points are not recorded.Not to mention monitoring, there is no ticket office, and the trains and boats are not fixed.

Wang Chuanxing continued: "Shunling Township is also connected to expressways and national highways, as well as county and provincial highways, long-distance stations, and long-distance bus stations to Changyang City. There are also black cars and black motorcycles in the local area. Monitoring is basically useless... "

Wang Chuanxing looked at Wan Baoming again, and said, "The special case team didn't get through with the transportation."

"Where are the witnesses?" Jiang Yuan continued to ask, not surprised: "Did someone hear the meter reading and didn't come out to see it? Didn't the murderer go to someone else's house to read the meter?"

"I didn't go to other people's homes." Wang Chuanxing said: "This is what the neighbor next door described. The local residential area is a pattern of small courtyards next to each other, but many people have moved to other places. The victim's neighbor couple I'm almost 70 years old, and it's time for a nap in the afternoon, I just thought it was noisy outside, so I didn't go out to see it."

"Did anyone else hear the call to read the meter?"

"Three or four people said they heard it."

"What about the time? How long have you been shouting?"

"There are so many things to say. Some say they heard it a few times, and some said they heard it for a few minutes." Wang Chuanxing said: "They are all old men and women, and their ears are not very good."

"Well, I understand." Jiang Yuan pondered for a while, and said: "So, how did you determine the direction of your investigation at that time?"

"A homicide caused by burglary or robbery." Wang Chuanxing said.

Wei Zhenguo asked, "Didn't they kill people randomly?"

"Someone might have brought it up like this at the beginning. But the task force judged from several directions that it was not a random killing." Wang Chuanxing looked at Wei Zhenguo and said, "First of all, the location of the crime. The traffic in Shunling Township is relatively complicated, but it is a small town after all. , a place that outsiders have never heard of. The murderer came here deliberately to commit crimes, and it is not a random act in itself."

Wang Chuanxing paused for a while, and then said: "It is relatively special to read the electric meter. Changyang City did not need to read the electric meter many years ago. The murderer shouted this, which shows that at least he understands the situation, and at least stepped on it."

"The task force believed at the time that the murderer probably wanted to take advantage of the fact that there were many elderly people living alone in the area and they were relatively wealthy, so as to trick the door into opening and carry out the robbery. Based on the situation in the community at the time, one or two people were enough to control the scene."

"According to our interviews, the victim had the experience of joining the army, and usually has a relatively strong personality. This may be the reason why the robbery went wrong, and the two suspects stopped the criminal plan!"

Jiang Yuan couldn't help looking at Wan Baoming.Wang Chuanxing's description is somewhat different from Wan Baoming's original description.

Of course, the objective situation is the same.It's just that from Wanbaoming's description, there are more uncertainties.

Wang Chuanxing's description seems to have more certainty, but after careful consideration, it is mostly conjecture.

"Is there any evidence for the judgment of burglary or robbery?" Jiang Yuan then asked.

Wang Chuanxing said: "At that time, there were many thefts and robberies in Shunling Township, one of which was solved, and the culprits were two truck drivers. Because after the local logistics park was built, the freight costs became lower and lower, and the local drivers The income is affected, and there is pressure on the mortgage and car loan, so I took the risk..."

"So, do you think this case was also done by the truck driver? Then we should investigate."

"Well, there is no result." Wang Chuanxing did not deny it, and said: "The local thieves and criminals who have committed violent crimes have also been investigated. There is no result."

Jiang Yuan nodded slowly, asked a few more questions, and said, "Then I want to go to the scene to see, is Team Wang free to join us?"

"Okay, let me know when you set a time." Wang Chuanxing smiled, got up and went back.

Wan Baoming and others left, and asked Jiang Yuan: "It seems that you have an idea?"

He was born as a technician and knows how to do technology. If he didn't have a strong purpose, he would definitely not go to the scene first.

Paper work is a more acceptable method for technicians.

Jiang Yuan nodded, and asked Wan Baoming: "It seems that you and the special case team have some disagreements on this case?"

"It can't be discussed. Disagreements can't be discussed." Wan Baoming waved his hands again and again, saying: "The task force is to solve practical problems, and their purpose is to solve the case. The case is defined as a random crime, so how can we solve the case, right?"

"But you think it was a random crime?" Jiang Yuan asked.

"Part of it." Wan Baoming's expression changed, he looked at the door first, saw that there was no one, and then said in a low voice: "Although I don't respect the deceased, but the romance of random crimes, I mean the romance of literature and art, It's really rare."

Jiang Yuan glanced at Wan Baoming, and some things were indeed quite scarce.

(End of this chapter)