civil forensic

Chapter 543

After driving for three kilometers, they arrived at the second target area designated by Jiang Yuan.

Jiang Yuan got out of the car as usual and walked for a while, about 100 meters away, and then waved for someone to come over.

This is under the high wall of a villa community.

The wall is three to four meters high, and there is a layer of barbed wire on the top, with threatening words written "Electricity Danger".

There is a green belt under the wall. There are some tall trees planted next to the wall. The trees are not very old, but it feels like you can climb up and look at the height inside the wall.

The width of the green belt is about three or four meters wide, and there is also a circle of low Euonymus euonymus on the edge. The dark green leaves are oval, smooth and hairless but extremely dense.

Beyond the green belt, there are sidewalks and roads, and on the other side of the road is another wall, which is another villa community.

This kind of road between the villa community and the villa community, on the side where there is no garage exit, there are almost no cars passing by, and occasionally passing by at a speed of [-] to [-] kilometers, and there are very few pedestrians, Jiang Yuan and others I haven't found a single one since parking.

If the criminal chooses this green belt and acts behind the bushes, the concealment effect will be similar to that of a car shock.There's a low chance it'll be found, but that's why it's extra exciting.

Jiang Yuan signaled the accompanying technicians to take pictures and keep the video, and said to Pang Jidong: "This is it, let's check again."

Jiang Yuan himself dressed neatly again and entered the green belt to investigate again.

Half an hour later, Jiang Yuan withdrew in disappointment.

The place is right, but no usable clues can be found.

I have to say that committing crimes here in the green belt really has some advantages, especially for rape, it is easy to leave some hair, dander, and various liquids on the ground due to intense actions and other reasons .

If it's a concrete floor, look for it after a while, maybe you can still find some debris.But in places like green belts, a large number of decomposers will automatically and consciously wipe them out.

Of course, there are dangers. It seems that there are always people who are photographed when the car shakes, and there are always people who can't wait to run to the top of Sining Mountain, and check the past car by car...

"No clues were found." Jiang Yuan returned to the car and shook his head, concentrating on investigating the crime scene for half an hour, which was quite tiring.

Pang Jidong said hard, looked at the second scene again, and couldn't help saying: "The criminal will stay in the second scene for a long time, and just do it in the green belt... committing a crime? It's still too confident."

"Judging from the pollen map, it's here." Jiang Yuan couldn't figure out the state of the case when it happened, and asked in a discussion tone: "Could it be that this kind of excitement is what the criminal is after?"

Pang Jidong said uncertainly: "It's possible. But the risk is not small... Didn't anyone notice it four times..."

Jiang Yuan couldn't solve this problem. He waited for a while, and then said: "It's time to go to the No. 2 victim's first scene."

"Okay..." Pang Jidong agreed, got in the car, suddenly shook his head and laughed, and said, "It's kind of strange. We were in the task force at the time, and there were crime scenes that we couldn't find no matter how hard we looked. appeared... I don’t mean to be skeptical, but I just feel that the world has changed a lot.”

"The accuracy of the pollen map is relatively high. Even if they are all green belts, the things planted are similar, but if you count the distance, the difference will not be very far. Moreover, regardless of the types of plants in the green belts, the actual All kinds of plants will naturally grow on and under the bushes, just like there are weeds in the farmland..."

Jiang Yuan did not elaborate on the types of these plants, but roughly speaking, in a green belt several hundred meters long, if the planting time is relatively long and the area is not large, there are always [-] to [-] kinds of weeds and wild flowers. of.

Asking Jiang Yuan to explain again, Pang Jidong felt a little embarrassed instead, and waved his hand and said: "Every few years, new things will come out in the laboratory, I just can't learn them, but it's okay to cooperate with them, don't worry Well, I won't lose the chain here..."

Having seen Jiang Yuan's previous process of solving the case, Pang Jidong is now only worried that there will be problems with his cooperation, which will hold Jiang Yuan back.

Jiang Yuan smiled, and wanted to say a few words of reassurance. At this time, the system screen in front of him jumped out:
Mission: An old man with a long-term ambition.

Task content: The former Pang Jidong was the young criminal policeman most familiar with advanced technology in the team, and he was a new force with knowledge, culture, technology and science.He used various technical strengths to solve many major and important cases in a row, avenged justice for the dead, and made the living safe... The new technology of the new era is coming, and Pang Jidong, who is nearly half a century old, is struggling to keep up with the development of technology.Help him.

Objectives: To make Pang Jidong fully understand the elements of forensic botany, and be familiar with the ways and methods of using forensic botany to solve crimes.

Jiang Yuan's eyelids jumped wildly. After reading the system's tasks, he turned his head to look at Pang Jidong, and couldn't help frowning.

Pang Jidong is almost 50 years old, and his memory and comprehension must have declined a lot.And the content of forensic botany, but really a lot.

Even if the system does not require it to be taught forensic botany, but only learns to use forensic botany, the complexity is high enough.

Most importantly, is Pang Jidong willing to cooperate?
The new location designated by Jiang Yuan arrived soon.

This is the No.2 victim's first scene.

Compared with the first case, this case was only 8 days later, and the murderer was much more cautious.

The first site he chose was the bottom of a small bridge.

This bridge is only tens of meters long, and there is another approach bridge more than 20 meters long. The two sides of the approach bridge are still green belts and residential areas.

The place where the perpetrator committed the crime was in the green belt at the junction of the approach bridge and the small bridge.

The probability of being discovered here is relatively low. It is even possible to park temporarily under the bridge. There are almost three or four cars vacant, and no one is in charge, and there are no cameras.

Raping here may have reduced the excitement, but provoking the police would probably make up for the dopamine he lost.

Jiang Yuan found the place, first asked other policemen to take pictures and photographs, and then said to Pang Jidong while wearing it: "The pollen map is also called the pollen signature, which means that the accuracy of the signature is similar. This cannot be proved by a single pollen, a single There are not many things that pollen can prove, and the possibility of floating from the outside must be considered..."

He said while looking at Pang Jidong.

Although Pang Jidong was a little confused, he still nodded: "So the type of pollen must match exactly, right?"

Jiang Yuan, who had just received the task, explained it to Pang Jidong in detail, saying: "That's not necessarily the case. It depends on the type. Sporopollen is basically everywhere in the modern living environment. Including office buildings in cities, There will also be pollen, but generally speaking, it is wind-borne, there are insect-borne and bird-borne pollen, and there are water-spread pollen. The latter types are different from the previous types... ..."

After the introduction, Jiang Yuan continued: "It's not an accurate quantification either. Generally speaking, the type is determined first, then the site is found, the site is found, and the ratio is determined..."

The rise of Jiang Yuan said: "Of course, it is not purely unquantifiable. Some sporopollens have been studied by botanists, such as pine pollen grains of pine trees. Seeing the wind-pollinated pollen with such a balloon structure, We know that it is of the distant transmission type, and even the distribution of pine pollen in the whole city, we all have icons and some formulas, if you are not familiar with it, just check it..."

"There are also rushes, sedges, straws, etc., all of which have their own characteristics. Specifically, we can refer to some icons...":
As Jiang Yuan was talking, he saw that Pang Jidong's eyes were gradually losing light, like a child who was listening carefully, his eyes could not focus.

Jiang Yuan then stopped, smiled and said: "No hurry..."

Pang Jidong was shocked: "Why are you not in a hurry?"

"It's okay. I'll take a look at the scene first." Jiang Yuan said.

"Oh, I... I'll take a rest first." Pang Jidong breathed a sigh of relief, only feeling his head swell.

Jiang Yuan taught Pang Jidong a lesson and asked him to digest it for a while.

As for whether Pang Jidong is willing to learn... Jiang Yuan is not going to give him this choice for the time being.

At the third scene, there are still no usable clues.

Jiang Yuan is not in a hurry now, knowing that the criminal is a cautious person, when Jiang Yuan was doing on-site investigation, he began to spend his time teaching Pang Jidong a lesson.

Pang Jidong is old and slow to respond, the advantage is that he is willing to listen.

In his generation, if someone is willing to teach something, at least respect must be shown, otherwise it is a social issue.

The downside is that at Pang Jidong's age, after learning things for a while, he starts to lose consciousness...

Jiang Yuan paid attention to Pang Jidong's expression and state, and if he saw that he was awake, he would output a pass, and if he saw that he was dizzy, he would let him rest.

The fourth scene...

The fifth scene...

The sixth site...

When they ran to the seventh scene, Pang Jidong's people were already exhausted, and fell asleep after listening to it on the road.

He didn't even realize what was happening.

It only took a short time for Jiang Yuan's sudden learning assistance to exhaust Pang Jidong's brain resources.

His mind is now full of sporopollen, and he can't think of other questions.

The few police officers next to them were also in bad condition. They more or less heard Jiang Yuan's output. After listening too much, they seemed to be polluted. Their bodies were shaking a little, and their reactions began to slow down. .

Jiang Yuan saw that the task had not been completed, and knew that Pang Jidong was not in place, but he couldn't accept it for a short time, so Jiang Yuan got out of the car by himself, and continued to conduct on-site inspections.

Finally, there was the eighth scene, and there was still no gain.

Nothing was found at each site, which in fact explained certain problems in itself.

On the one hand, this shows that the perpetrator is very cautious. In the subsequent process of committing crimes, his proficiency may be improved, but on the other hand, Jiang Yuan feels that the perpetrator may return to the scene.

Instead of returning to the site soon, but returning to the site after a period of time, and further cleaning the site - the reason for this idea is that the site is too clean, all 8 sites are only green, no sundries and garbage , a scene without any artifacts, while possible, always feels a little too clean.

This is not completely consistent with the hygienic conditions of the green belt that Jiang Yuan saw along the way.Even though there are many villas and low-density residences nearby, there are always paper scraps, broken bottles, plastics and the like in the large green belt.

However, these thoughts of Jiang Yuan are also speculations, which are also not supported by evidence.

After walking down this trip, the clues I really got were actually the locations of the 8 scenes.

The farthest distance between the 8 sites is about four or five kilometers, which means that they are all confined to one area.

"Let's go back. Let's stop here for today's site survey." Jiang Yuan sat back in the car and patted Pang Jidong.

Pang Jidong twitched, as if he had been awakened, his eyes were wide open and lifeless.

(End of this chapter)