Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Lu Chuan has the tire mark identification and analysis skills rewarded by the system.

Trace identification includes the impact of different tire types, different tire pressures, different tire wear levels, and even different tire models and types on traces.

Simply put, even the same tire leaves different marks on different surfaces.

In other words, the same tire on the same ground will leave different tire marks due to different tire pressures.

The influence of tire marks is controlled by many factors such as air pressure, temperature, ground conditions, tire wear, etc.

It is an identification and analysis process that is extremely difficult to synthesize and the analysis situation is very complex.

The identification and analysis that Lu Chuan did this time was relatively simple. Burst scars caused by a tire being squeezed are completely different from cuts caused by sharp objects.

During the tire manufacturing process, the thickness of the sidewall and tread is maintained at a specific value as much as possible.

However, during actual use of the tire, after wear and tear, the sidewall, especially the thickness of the tread, will wear unevenly.

This wear will cause the tire to be thinner in some places and thicker in other places.

In addition, the tires will inevitably have some bumps during driving, resulting in peeling of the tire tread or tire wall.

This will cause one part of the tire to be much thinner than other parts. During the extrusion process, the thin part has a weak ability to withstand pressure and will burst first, forming tear scars.

Lu Chuan's inspection revealed that all four tires had natural lacerations and no neat cuts with sharp objects.

Therefore, from this point of view, the suspect should not have tampered with the tires.

brake.

Lu Chuan next focused on checking the brake oil circuit.

Most cars use hydraulic brakes.

Therefore, the pressure of the brake hydraulic oil has become an important factor in the braking capacity.

Moreover, hydraulic oil pipes are generally exposed. If the suspect wants to do something in this area, it is relatively easy. He only needs to crawl under the car and cut the hydraulic oil pipe, which will cause brake failure.

Although the vehicle has been squeezed, some of the chassis' oil lines can still be seen clearly.

Because after the squeeze, the vehicle's oil circuit had been destroyed, and the entire chassis was black and oily, making it difficult for Lu Chuan to judge with the naked eye.

"Gong Zhang, you are familiar with the vehicle. Please help me find it. Where is the brake hydraulic oil pipeline?"

Zhang Gong is the operator who operates the extrusion machine.

"Okay, okay, I'm familiar with this, I'll do it, I'll do it."

The other party knows that he has made a big mistake, and now that he can make up for it, he is taking particularly active actions.

"This, this is the brake hydraulic oil pipe of the left front wheel."

The other party was indeed a professional. Within a few minutes, he found a greasy pipe.

Brake hoses are generally made of two materials, metal and rubber.

In the past, vehicle brake oil pipes were made of rubber, but because rubber ages, the hydraulic oil pipe will be damaged over time, resulting in insufficient hydraulic oil pressure and brake failure. Later, some high-end models began to use metal. Hydraulic oil pipe.

However, due to cost reasons, many low-end models still use rubber fuel pipes.

The police car Ren Qiang drove was bought only three years ago. The configuration of the vehicle is pretty good. At least the safety is guaranteed, otherwise Ren Qiang would not have only broken one leg and one arm.

The vehicle's brake hose is also made of metal.

Because of the extrusion, theoretically the oil pipe should have been damaged and burst long ago. However, the oil pipe found by Zhang Gong showed no signs of bursting, and was just deformed to a certain extent.

The four oil pipes are all still on the ground. They are only slightly deformed and the connectors are all good.

"This...isn't right. Why didn't the oil pipe explode after extrusion?" The extruder operator also discovered something was wrong.

Lu Chuan picked up the oil pipe and looked carefully at each one. He found a small hole cut by a saw on the oil pipe that was originally the left rear wheel.

"The brake fluid must have leaked out from this hole."

If the brake fluid is gone, the brakes will naturally fail. This is the culprit of Ren Qiang's car accident in Beishan.

The evidence that man-made car accidents were caused was finally found.

Putting the hydraulic oil pipe into the evidence bag he brought with him, Lu Chuan was going to go back and do an appraisal. If the other party was careless and didn't wear gloves, he might be able to leave fingerprints on the oil pipe.

"Seal the vehicle and no one can touch it."

"Don't worry, I'll watch it myself and make sure no one can touch it."

After Lu Chuan finished explaining Zhang Gong, he went back to find Zhang Hui.

Zhang Hui is investigating the trailer registration records and should have some clues.

Parking lot office.

Zhang Hui saw Lu Chuan coming back and asked quickly: "How is it? Did you find anything?"

"Yes." Lu Chuan took out the evidence bag containing the brake oil pipe: "The brake oil pipe of the left rear wheel has a small hole that was cut with a saw."

"The hole is not big, and the brake fluid cannot drain out in a short time. When Brother Qiang was driving, there must have been nothing wrong for a while, but after the brakes were used frequently, the brake fluid leaked out of this hole. When we arrived at Beishan The accident probably occurred because the brakes completely failed."

It was indeed a man-made car accident, and now we finally have conclusive evidence.

"Damn, these people are so brave!"

Zhang Hui has been a criminal police officer for so many years, and this is the first time he has encountered such a thing.

Moreover, this is also a very scary thing to think about.

Why did the other party target Ren Qiang?

Ren Qiang's return from Liangzhou City was a temporary decision, not a planned arrangement.

It is even more unlikely that someone knew the clues about the Songbei Mining case in advance.

Also, Ren Qiang was driving a police car. How did the other party find this car?

How do you know where the vehicle is parked?
If you think about it carefully, there are too many questions here.

"Brother Hui, how are you doing here?"

"The deck, the opponent's trailer deck."

The trailer in the video can enter the parking lot directly because the vehicle prohibition system at the door has the license plate number of the trailer.

The trailer with this license plate number has indeed been reported to the traffic police detachment.

However, we have just verified by phone that all the vehicles with license plates are being repaired and are being torn into pieces in the repair shop. It has been a week. It is impossible for the other party to go to Beishan to tow the police car today.

Therefore, it is certain that the other party forged the number plate and entered the Beishan parking lot.

"I have asked the traffic police to check. After the other party leaves the parking lot, he must not disappear into thin air. The target of the tow truck is relatively large. Let's see if we can find the vehicle."

Zhang Hui has a clean mind on this kind of procedural matters and will not make low-level mistakes.

"The situation here is probably like this. We have to go back and report to Team Qin." (End of Chapter)