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

Chapter 81: Discovery from Tire Size

In the criminal investigation detachment, murder is an order.

There is a murder case, and everything must give way to the murder case.

There is no time limit for overtime, and all vacations are cancelled. This is the case every time.

When Zhang Wen's murder happened last time, there were two front-line criminal police officers who were on vacation. They just got off the plane and bought a ticket to fly back before leaving the airport.

As for airfare reimbursement...

Don't think about it, vacation is not a business trip, so how can it be reimbursed.

The Criminal Investigation Detachment is very poor. Lu Chuan heard about it when he first started working, more than once.

And looking at those old cars with teeth, it can also be seen.

The equipment is old-fashioned, and the detachment building has not been renovated for more than [-] years.

The decoration style makes Lu Chuan feel like returning to his childhood.

The floors in the building creaked when stepped on.

This is why the enamel tanks used by four people in the current survey office are so harmonious.

The environment is the environment of that era.

Except for some laboratories that have been invested in and built in recent years with a modern style, the others are really old and can be used to make nostalgic movies.

However, the criminal investigation detachment is sometimes really rich.

For example, now, when a murder occurs, it can be said that the cost is not considered.

Human, material and financial resources, no need to apply, just use them directly, and give them what they want.

As long as it can solve the case.

Standing outside the building, the entire building of the Criminal Investigation Detachment was still brightly lit.

Many people came and went, in and out.

It was past three o'clock in the morning, and it was not as quiet as it used to be.

"Master, it's done."

After yawning, Lu Chuan handed the four reports to Liu Guodong.

This is the benefit of owning technology.

Speaking of identification, he can be driven out without eating, drinking or sleeping all night.

In the past, these things had to ask the traffic police detachment for help.

"Two cars, an SUV... and a van?"

That's the vehicle information for the four sets of tire tracks in the four reports.

Lao Bai and Yang Sen also came over and began to read the report.

The two couldn't help much, and just fell asleep on the sofa.

Feeling good now.

In fact, for Lao Bai and Yang Sen, this kind of overtime work without taking leave to go home is quite good.

Needless to say, Lao Bai, at this age, all kinds of parts and components do not work well from time to time, and he can't do much when he goes home.

Yang Sen has been tortured by his wife and son in the past year.

The menopausal wife and the son who is about to take the college entrance examination, Yang Sen thinks nothing is more terrifying than these two.

Now being able to rely on the murder case to stay in the office and smoke Huazi cigarettes is simply not too chic.

No one wants a homicide, especially a sacrifice like Song Kun's.

But from the perspective of whether to go home or not, Lao Yang obviously has his own views.

Lu Chuan lit a cigarette for himself. This night, he had already wiped out a pack of cigarettes.

No wonder most of the detectives are heavy smokers.

There is a high probability that he stayed up all night.

"Two off-road vehicles." Lu Chuan paused: "Actually, to be precise, they should be SUV models. One has a wheelbase of 2550 and the other has a wheelbase of 2560. Both are compact SUVs."

"The tire has a tire width of 205 and an aspect ratio of 60. Most of the SUVs using this tire are relatively cheap."

"I don't know much about the prices of models, so I can only make a general guess."

"And both cars are two-wheel drive."

"As for the van, the tires were severely worn, the tread was very shallow, and the pressure of the four tires was uneven, and one of the tires was not the same as the other tires."

"This should be a cargo van, and the age of the vehicle is estimated to be relatively long."

Lu Chuan pointed to the last report: "This report..."

"I recommend it as a key investigation object."

"Oh why?"

Liu Guodong took out the last identification report for car tires and read them carefully.

"Because the tire tracks on this car are a little special."

"This group of tire marks, the tire widths of the front and rear wheels are different, which is rare in domestic cars."

In the report, it is recorded that the front tires of this set of tires have a width of 245 and an aspect ratio of 45, while the rear tires have a tire width of 275 and an aspect ratio of 40.

There are strict standards for the production and use of tires.

What kind of vehicle and what kind of tires to use are determined when the vehicle leaves the factory.

Generally, it cannot be changed at will. After the change, the handling, safety and comfort of the vehicle will be affected.

Moreover, changing the tire specification and size involves modification, and it needs to be filed and approved before it can go on the road.

Lu Chuan went on to introduce: "The flatness ratio of a tire refers to the percentage of the tire's cross-sectional height to the maximum width of its cross-section. Simply put, it is the tire's aspect ratio."

"A tire with a high aspect ratio has a long sidewall and a strong cushioning capacity, so it is relatively more comfortable, but it has a poor feeling on the road surface and weak lateral resistance when cornering."

"Tires with low aspect ratio and large inner diameter have a relatively short sidewall and wide tread, so the ground contact area is large, the pressure the tire can withstand is large, the reaction to the road is very sensitive, the lateral resistance when turning is strong, and the vehicle's control Strong."

"This car not only has a small tire aspect ratio and wide tires, but also has narrow front wheels and wide rear wheels. Generally, only vehicles that pursue extreme driving control will have such a design, and most of them are imported cars."

"As far as I know, among the common brands, only BMW and Jaguar will have this tire design in mass-produced cars."

"According to the tread pattern of the tires, it can also be determined that this car is a rear-drive model, which is more conducive to improving the handling of the vehicle."

"Under normal circumstances, the probability of such a car appearing in the ravines around Xinjian Village...is not high."

Liu Guodong's eyes lit up after listening.

Yes.

In the ravine near Xinjian Village, there is such a car that pursues extreme handling?
"Little Lu Xing, you still said that you are not familiar with the car models, you don't quite understand that."

Old Bai clicked his tongue, with joy on his face.

Since Lu Chuan came to the spot survey, the spot survey office has played an increasingly important role in solving the case.

Originally, there were many resources in the current survey, but now they play a big role, and the face is very good.

In any place, there is never a proportional relationship between the amount of resources and the role played.

Lu Chuan grinned, he really didn't know much about vehicles.

The reason why he knows this special car better is because he owns one.

Due to the different sizes of the tires, the front of the vehicle is low and the rear is high, the visual effect of the appearance gives people a very powerful feeling, and the visual effect is full.

That is a little expensive.

The identification and analysis reports of the four sets of tires were quickly delivered to Qin Yong.

Qin Yong, who had been up most of the night, had red eyes.

But the progress of the case is still effective.

In particular, the footprint analysis done by Lu Chuan delineated the range of suspects, which provided a useful reference for the criminal police on the front line of investigation.

Although there is no substantial progress yet, it is still better than the blind man feeling the elephant. Whether there is a target range or no target range is not just the difficulty of investigation.

It is also a good incentive for the morale of the frontline criminal police.

Just like a teahouse or a club, only when new teas are constantly served, will there be tea lovers who will continue to experience and try new ones.

Just a few black teas, green teas, and oolong teas over and over again, and the business will definitely get worse and worse.

People are like this, curiosity is the original sin of all desires.

Tasting tea and solving crimes are all the same.

Finding people who don't know what kind of person they are in the vast crowd is different from finding a man and a woman with a certain height and weight range. The expected difficulty is different.

Qin Yong's eyes glowed green when he saw the tire track appraisal report.

Just as Lu Chuan guessed, how could this kind of car go to the valley?
It's too remote for field battles where no one is watching.

"Come on!"

(End of this chapter)