civil forensic

Chapter 675
Hearing that the paint was found, Tao Lu and others were even more excited.

Tao Lu is a criminal policeman, and he doesn't understand criminal science himself, but he knows one thing, as long as there is paint evidence in the inspection materials, the laboratory will basically not miss it, and will give some explanations, and the court will accept it. Also very broad.

This is because paint evidence is widely used, and the most common is car paint. In road traffic accident cases, vehicle paint evidence is often used to lock the suspect vehicle and determine whether the collision played a key role.In addition, marine paint, architectural paint, spray paint, etc., also frequently appear in the case.

The complex composition of paint may be troublesome in industry, but it is very easy to use in criminal identification.There are even more outrageous inspection methods, such as microscopic inspection, infrared spectroscopy, Raman spectroscopy, scanning electron microscopy, X-ray energy spectroscopy, X-ray fluorescence spectroscopy, Py-GC/MS inspection-if the loyalty of officials can be judged by so many If there is no such technical test, clean government has already become a basic practice.

The police station's own trace evidence laboratory did not dare to neglect, and worked overtime to help jump into the queue.

In just one day, the inspection report was delivered to Tao Lu's desk.

Tao Lu flipped through the inspection report quickly, with a triumphant smile on his face.

The members of the task force who heard the news immediately filled Tao Lu's office.

The director of the inspection center smiled and passed the report to everyone, and explained on his behalf: "The white particles are indeed paint, and they come from Foton's micro-card. We have used various methods to verify, and the most mature infrared method is used in the report. According to the test done by the spectrometer, it can be seen that there is an absorption peak of 1724 in the sample, and there are also absorption peaks of 1601 and 1583..."

Several senior criminal policemen nodded their heads "hmmm", as if they were dealing with their wives, and didn't listen to what the director was trying to say. At the same time, they craned their necks to read the report one by one, as if they understood it.

The director of the testing center suddenly had an expression of resentment: "The final conclusion has been told to you..."

"If you have a micro-card, check the vehicle's driving track first? To be on the safe side, visit the nearby residents? This kind of car is still very conspicuous in residential areas." After reading the report, Cui Qishan became emotional: "It's the time span Relatively large, but shouldn't be a problem."

In the current police system, as long as the license plate of the vehicle is entered, you can see its driving trajectory for a long time in the past. Of course, this driving trajectory is mainly completed by monitoring, which belongs to the application of big data. It made the criminal policemen worry about following the car like they were blind.

Even if the vehicle covers the number plate, etc., the police can call out its trajectory through fuzzy search.

Liu Sheng next to him said: "It should be possible to find similar cars passing by nearby. I don't know how many there will be, but it doesn't take much work to find them one by one."

"There is a problem. The paint of the van on the bones does not mean that the van will be driven to the open space. It is possible that the van is the first scene, and the open space is the place where the corpse is dumped, but other means of transportation will be used in the middle."

This sentence was the key, and it flushed the blood of several criminal police officers a lot.

Tao Lu turned his head and took a look, only to see that it was Xiao Si from Cui Qishan's new task force who poured cold water on him.

Liu Jinghui coughed twice, and said: "The van may indeed be parked in other places, but I think there is a high probability that it has been driven to an open space. Otherwise, the transportation of the six corpses would be a great trouble. Even if The murderer didn't understand at first, and after transporting the corpse once or twice, he would give up this method."

"The microcar is generally three meters long, maybe three meters long. You can't run in many places in the city. You can't run in this open space, at least during the day. It's not very convenient and conspicuous to drive here at night. "Xiao Si has spent a lot of time on this case, and has his own ideas, so he won't be easily persuaded.

Liu Jinghui thought about his words, smiled again, and said, "It's true that this factor cannot be completely ruled out, but moving the corpse is not an easy task. When the victim just died, the corpse was so heavy that the murderer had to dismember the corpse and decompose. Everyone has seen how buried the dead body is, even if the bones are rotten, there are often things attached to it. In this case, changing the car, the murderer is making it harder for himself."

"Moreover, there will be a lot of evidence left on the car, and it will be difficult to clean." Tao Lu nodded to Liu Jinghui, and said, "Let's not consider the issue of transshipment, Liu Chu, you continue to say, oh, Jiang Yuan is here, and the Jiang team is here. Here."

He was tantamount to denying Xiao Si's idea.

When Tao Lu saw Jiang Yuan, he smiled from the bottom of his heart. The case seemed to be on the horizon, but it was all Jiang Yuan's credit.

As a criminal policeman, he can figure out the situation at the scene after questioning one, two, three, four.And the young forensic doctors present had already excitedly described Jiang Yuan's discovery experience over and over again.

If this case is solved, this scene will be talked about by everyone for a long time.

Jiang Yuan greeted with a smile, and did not sit down, just said: "I have read the electronic version of the report, you continue to talk."

Without waiting for others to open their mouths, Xiao Si said without giving up: "I admit that the possibility of replacing the vehicle is not high, but we should consider this situation. In addition, the paint we found should not be the exterior paint of the vehicle, but the exterior paint of the vehicle." Let’s paint the interior. If that’s the case, could the murderer just use Foton’s paint to touch up the paint? I don’t mean to raise an argument, but the price of Foton cars is relatively low, and there are also repair shops that use their paint to spray other cars. Maybe."

Tao Lu and the others frowned.

As for Xiao Si's argument, there is some truth to what he said, and it has to be taken into consideration.

Liu Jinghui waited for a while, and said: "The core breakthrough point now is this car. Is it a Foton brand van? I think you can search for the Foton brand first, and check all the vehicles that pass the open space in the driving track. No, let’s think about the situation that Xiao Si said.”

When he reasoned like this, everyone's thinking instantly became clear.

Cui Qishan pulled Xiao Si back and said with a smile, "I was almost abducted into a ditch by you."

Xiao Si spread his hands and did not force his approval.

Liu Jinghui coughed and coughed twice, and said, "I have a trick here, you can try it."

Tao Lu looked over immediately, it was true that there was no upper limit to the budget of this case, and it was true that he had no money in his pocket and a guilty conscience.

Liu Jinghui went on to say: "I thought of it when I was reading the records. Several residents near the open space here have reported and called the police very frequently. In addition, because they want to demolish the house, they don't care about these construction vehicles, trucks, etc. , are also very sensitive, and it is often mentioned in the police records, maybe you can check and compare the records two years ago, maybe there is a license plate number."

Tao Lu slapped his thigh, turned around and said, "Old Liu, I leave this to you."

Liu Sheng quickly responded.This method is cheap and cost-effective. Sending two people to check the records may lead to a breakthrough in the case. It is a gift from heaven.Even if you can't find it, it's actually nothing. The workload of two people is nothing.

Cui Qishan didn't have time to raise his hand, until he left the door, he still felt a little regretful, and said to Xiao Si: "You just shouted yourself, they are all captains and the like, I'm sorry to argue with you. If you can't fight, it's okay It doesn't matter, Tao Zhi doesn't like you anyway."

Xiao Si shook his head and said: "I'm like the shit stirrer in the shit peg group, how could I be allowed to touch this kind of cake."

Cui Qishan was stunned for a moment, stared at Xiao Si for a long time, and said, "If it's really shit, you won't be able to stir it up."

(End of this chapter)