Zhou Ning's doubts did not prevent the task on the display screen from being released, and the green words kept jumping out.

Prompt:

Please note that if you choose to view the reward content of the task, you will accept the task by default!

Temporary Tasks:

To find the vehicle and the perpetrator who hit and injured the deceased, the task completion time must be within 48 hours, and the reward forensic on-site study level 3 must be completed, and the reward for the first failure of the task will be reduced by one level.

Immediately, the other handwriting on the screen disappeared, and there was only a 48-hour countdown left, and the sense of urgency came out in an instant.

Zhou Ning: ......

He wanted to scold his mother, this is simply unreasonable, Ma Dan has such a rule, why didn't you say it earlier?

Just a brake mark, what can this thing say?

Wait, brake marks......

Zhou Ning's mind suddenly popped up with the forensic scene study, and he automatically searched for a piece of content, which was about the investigation of the car accident scene, and one of the very important passages was brake marks.

Holding a ruler, Zhou Ning measured the width of the unilateral brake marks more carefully this time, as well as the spacing between the two brake marks, and estimated the wheel base in the figure 8 trace.

Three values were obtained: tire width 235 mm, wheel base 1586 mm, wheelbase 2841 mm.

Seeing these values, Zhou Ning looked up at Zhao Xinli.

"Do you know cars? If you don't understand, find someone who understands. ”

Zhao Xinli stood on the side, watching Zhou Ning write and draw, and suddenly he was a little confused by such a question, but he still nodded quickly.

"Look down on people, don't you! From F1 to the three-wheeled wheels used at home, I have studied, at the age of twelve I can dismantle the car that my dad wants to repair, as long as the car on the market, there are in China, I basically know a little, I say the second in our criminal police team, no one dares to say the first, what do you say? ”

When Zhou Ning heard this, he hurriedly handed the splint in his hand to Zhao Xinli.

"I don't know if you've studied these traces before, but I measured them and got three values like this, can you tell what kind of car it is?"

"I'll take a look, the people from the traffic police team came to determine that this was a sedan trace, and we didn't let it go."

Zhao Xinli glanced at it, became interested, blinked his eyes, and quickly clicked on his mobile phone to rummage through it, Zhou Ning felt a little bottomless in his heart, if he was looking for Du Niang, it might not be accurate.

For a moment, Zhao Xinli held up the mobile phone in front of Zhou Ning, and there was a picture on it, all of which were all kinds of data, which seemed to be the content of the official release.

"These data are most consistent with the Volkswagen CC 2010 2.0TSI Premium, which is exactly the same as the data you gave."

Zhou Ning nodded vigorously, the excitement on his face that could not be suppressed.

"You inform Xu Da, find the model, and the search range can be less."

Zhao Xinli smiled toothlessly, and asked him to call the good news, which was Zhou Ning's trust in him, and quickly got up to call.

Zhou Ning stood up and walked more than ten meters to the north, and found that there was also a tower cone sign here, a slightly lighter brake mark, although there was no 8 characters drawn at the end, it was also two opposite C-shapes.

After measuring the data, it was found that it was completely different from the previous one, with a tire width of 357 mm, a wheel base of 15,900 mm, and a wheelbase of 2,780 mm.

An idea suddenly appeared in Zhou Ning's mind, if it were two cars, could it be ......

He shook his head, perhaps thinking too much to himself.

Go back to the bloodstained brake marks, get down on one knee and use a small shovel to scoop up some rubber from the surface of the road.

Just when I was searching for the contents of the brake marks, it was followed by an inspection report.

The report said that the rubber from the brake marks on the ground was extracted and then compared with the wheel rubber of the suspect's vehicle to identify the suspect vehicle.

Thinking about it, the report appeared in Zhou Ning's mind again, and he didn't sweep it away this time, but looked at it carefully.

In this paper, the conditions of gas chromatography-mass spectrometry analysis of rubber pyrolysis [1] were explored, and the established method and scanning electron microscopy-X-ray spectroscopy were used to examine the physical evidence of rubber in a traffic accident case.

By comparing the similarities and differences between samples and samples of rubber compounds and inorganic elements between different samples, the comparison and identification of samples and samples were realized, and it was found that the components of tread rubber and sidewall rubber of different tires were different, and even the composition of tread rubber and sidewall rubber of the same tire were different.

This has guiding value for the extraction of rubber physical evidence comparison samples, and provides an objective basis for the trial and litigation of cases.

The more he looked, the more Zhou Ning nodded, crossed the English part, and was below [Journal Name].

There is a [year (volume) issue] 2016 (041) 005, Zhou Ning is stupid.

This is an article six years later, so aren't these forensic field studies that I got not textbooks a few years later?

According to the system prompts, what I have now obtained is the second-level forensic field study, and the third-level is more detailed and avant-garde knowledge.

This discovery made Zhou Ning's excited heartbeat faster.

With a sinking of his shoulders, Zhao Xinli's big face came over.

"What do you think of Forensic Doctor Xiao Zhou, didn't you hear me talking to you?"

Zhou Ning exhaled, suppressed his excitement, and used the physical evidence bag to pack the extracted rubber particles, and the person also stood up.

"What's the matter, I didn't pay attention to what you said."

"The boss said he would be there soon."

Zhou Ning sighed, thinking of the 48-hour period, he was still a little worried.

At this moment, there was a sudden brake not far away, and a figure quickly got out of the car and crossed the cordon and ran to them, the person who came was Xu Dayuan, and the smile on his face could not be suppressed.

"Yes, Forensic Doctor Xiao Zhou, you are constantly surprising me today, are you sure about the model?"

Zhou Ning shook his head honestly.

"I'm not sure, but these three sets of data are no problem, Zhao Xinli is very familiar with the car, he found the Volkswagen CC 2010 2.0TSI poster, and compared it with the one found at the scene."

Xu Dayuan nodded and looked at the record in Zhou Ning's hand.

"Professional is professional, our people found brake marks, but they didn't get much information, they knew that it was a car, speeding state, I didn't expect to be able to compare these, give you a credit."

As he spoke, Xu Dayuan dialed a phone call and asked the person about the data, and the other party gave an accurate answer, and he breathed a sigh of relief.

"It's confirmed, it's the new Volkswagen CC2010, does Xiao Zhou forensic have anything else to discover?"

Zhou Ning thought for a moment and walked to the edge of the bloodstain.

"The deceased was standing here and was stabbed, and then did not move, and then was knocked into the air, according to the distance of the body flying out of 112 meters, and the weight of the vehicle, even if the car braked 4.5 meters, the speed was more than 100 miles per hour, so the speed before braking would be higher.

According to the rectal temperature, the time of the deceased's death was 2:23 in the morning, and on the report given, Forensic Doctor Liu asked me to write between 2:00 and 3:00, this time period, driving at such a high speed, the key is that I found that there was a car parallel to this brake tracks, I guess whether someone is racing illegally? ”

Zhao Xinli and Xu Dayuan both looked at Zhou Ning, after saying this, both of them were silent, Zhou Ning was a little nervous for a while, could it be that his guess was outrageous?

At this moment, Xu Dayuan kicked Zhao Xinli with anger on his face.

"Biaozi thing, I'll check the identity of the deceased, and let you lead the team here to find traces of the scene, you have seen a fart!"

Zhou Ning was stunned for a moment, and didn't dare to speak directly.

"Forensic doctor Xiao Zhou, hurry up and take me to see the brake marks you found."

Zhou Ning walked over with them, glanced at Zhao Xinli apologetically, and found that this kid didn't know what embarrassment was at all, and followed with great interest, still smiling on his face.

"Don't worry, leader, I just saw that the traces here are somewhat similar, but compared with the brake marks with blood stains, this place is much lighter, and the braking distance is longer."

Xu Dayuan waved his hand.

"Don't make up for them, hurry up and check, what is this data, can you know the model?"

Zhao Xinli was already eager to try on one side, glanced at the three data, quickly browsed it on his mobile phone, and looked at it for a long time, Xu Dayuan had already raised his legs.

Zhao Xinli dodged to the side, his fingers seemed to be zooming in on the picture, and then let out an exclamation.

"I'll go, it's really fake, someone in our county drives such an expensive car?"

............

PS:

[1] Pyrolysis gas chromatography-mass spectrometry:

In traffic accident cases, the scratches and bumps of vehicle tires and other objects, and the sliding friction between the brakes and the ground, will cause the rubber particles to transfer to the contact object or leave them on the ground to form brake marks. The examination of these rubber particles can provide evidence for restoring the truth and identifying the vehicle that caused the accident.

Automobile tires mostly use single or combined rubber of natural rubber (NR), butadiene rubber (BR) and styrene-butadiene rubber (SBR), and add organic or inorganic additives such as vulcanizing agents, accelerators, antioxidants, and fillers. It can accurately judge the rubber grade according to the characteristic cracking products, and can be used in combination with the SEM-EDX method to comprehensively analyze the organic components and inorganic elements in rubber, which has become an important means of rubber inspection and identification in recent years.