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

Chapter 80 Four Groups of Tire Tracks
Since the incident, the investigation office has always been Qin Yong's most concerned link.

Although the wreckage of the burned vehicles cannot be surveyed now, Lu Chuan found some footprints and tire marks at the scene, and Qin Yong is very concerned.

During this half of the night, Qin Yong wanted to go upstairs to the current survey office several times.

But he held back.

He knew that the current survey must be busy doing analysis, and it was useless to remove the time delay by himself.

It may even bring pressure to the current survey, and make some mistakes, then the gain outweighs the loss.

Glancing at the quartz clock on the wall, it was nine fifty-eight.

Not slow.

Liu Guodong walked quickly to the front of the conference table, and handed the footprint identification and analysis report in his hand to Qin Yong: "The footprints found at the scene, excluding our people, there are a total of two sets of unfamiliar footprints."

"This is the analysis report made by Xiao Lu."

Lu Chuan!

It was Lu Chuan again.

Qin Yong let out a long breath.

In the past, the Haizhou Criminal Investigation Detachment could not do footprint analysis by itself.

Except for some basic information such as men and women, height, etc., I can't figure out anything else.

Moreover, this information cannot be said to have a high accuracy rate.

In the past, they either asked the Technical Appraisal Center of the Provincial Department for help, or asked the Criminal Investigation Detachment next door for help.

But there are few experts in this field.

Although the trace inspection of the Tianzhou City Criminal Investigation Detachment was better than Liu Guodong and the others, they were limited.

As for the ministry...

You have a murder case, and others have a murder case.

There is no other way but to line up.

It's not like my own people, it's so convenient to use.

Slightly excited and emotionally accepted the analysis report, Qin Yong was slightly taken aback: "A man and a woman?"

The results of the first report: Male, 1.7 meters 32 in height, weighing about 37 kilograms, aged between [-] and [-] years old, walking with a slight posture.

Results of the second report: female, 1.6 meters tall, weighing about 25 kilograms, aged between 30 and [-] years old, with a high probability of undergoing physical training, with heavy heels, and wearing high heels for a long time.

Two reports, one male and one female.

Intentional homicide, or two people committing the crime, this situation is very rare.

Killing people is not playing cards, it cannot be done by one person.

Killing two people, especially planned premeditated murder, is very rare.

Among the homicide cases that Qin Yong has been in contact with, crimes of passion often involve multiple people committing crimes together.

For example, fighting and fighting, where multiple people fight each other resulting in death.

Multi-person premeditated crimes are extremely rare.

Not to mention a man and a woman committing the crime, even less.

"How accurate are these two reports...?"

Of course, Qin Yong raised the same question that Liu Guodong had just raised in the current survey laboratory.

"The accuracy of the male footprint analysis report is [-]%, and the female suspect's footprint analysis report is [-]%."

Ninety percent?

Seventy percent!

This accuracy rate is not low.

One man and one woman, with this scope, Ren Qiang and his team will be more targeted in their investigation.

Moreover, judging from their age, if they were taking revenge on Song Kun, then these two or one of them should have been arrested by Song Kun in recent years.

Of course, it cannot be ruled out that the child of a criminal committed the crime, but this possibility is very small.

Basically negligible.

Now surveying the laboratory, Lu Chuan and Lao Bai lighted cigarettes and were resting.

After working for half the night, Lu Chuan felt a little dizzy.

There is no need to go to the traffic police detachment. After all, the vehicle responsible for the accident has been found, and there is no need to analyze the wheel marks at the scene of the crime.

Now, what Lu Chuan needs to do is to identify and analyze the tire marks found on the road in the abandoned car ravine.

The Ford Everest, the vehicle involved in the accident, has been confirmed to have been stolen by the murderer.

But the vehicle they escaped from is not necessarily the case.

"Brother Bai, who will follow the car theft?"

"Sun Jun, one group is watching, but I haven't heard of any progress."

Lao Bai took the last puff of his cigarette and exhaled a big smoke ring: "The other party came prepared, stole the car to fake a car accident, and then burned the car to destroy the traces. This is not something ordinary people can do."

Yang Sen nodded approvingly: "The methods of these two people seem to be professionals."

No matter what industry, there is really a difference between professionals and non-professional officers.

I won’t talk about skills or anything, and I don’t understand professional vocabulary.

What do you mean by ants climbing a tree, old trees entangled in roots, and Optimus Prime? Those who are not professional don’t understand what it means.

Lu Chuan snuffed out the cigarette butt, and added another Huazi to Yang Sen: "Brother Yang, you mean...a killer?"

These days, in Haizhou City, there are still killers?
Under the current environment, this kind of occupation is as rare as Dongguan-style service.

"It's not necessarily a professional killer. Here, killers are rare. It can only be said that they probably have more than one life in their hands..."

Work cannot stop.

The three chatted for a while before returning to work.

Of course, Lu Chuan is still the main force, Yang Sen and Lao Bai will not be of much help.

The four sets of tire marks were collected by Lu Chuan on the road turning into the valley.

Four groups of tires are partially superimposed and rolled. Before the analysis, the tire trace pictures must be processed first.

Tire width measurement, comparative data of edge tire marks, analysis of tire aspect ratio, measurement of pattern wear depth, judgment of tire service life, etc.

It is different from the tire marks that can be collected at the impact site.

Tire marks on ordinary roads, and there is no tire rubber residue.

Or there is very little residue, which makes it difficult to analyze the tire composition.

However, the type of tire can be determined based on the pattern shape.

It can also judge the speed of the vehicle at that time according to the spacing of the patterns.

This is related to the elasticity of the tire. There is a difference in the size of a tire in a static state and a tire in a moving state.

Because of the influence of elasticity and inertia, the running tire is wider than the stationary tire.

And the faster the vehicle, the greater the difference.

Using this difference, apply the formula to calculate, you can roughly judge the speed of the vehicle.

Of course, the accuracy of this judgment is not high, because the deformation of the tire is also affected by the temperature.

The road surface of different materials will also affect it.

Therefore, it can only be estimated in a range that can be referenced.

Primary tire track identification skills, the data that can be analyzed is still limited.

It took Lu Chuan more than two hours just to separate and superimpose the four sets of tires.

When a murder case of this level occurs, the entire criminal investigation team will have no idlers.

Even those engaged in publicity are busy now, monitoring public opinion on the Internet at all times to prevent unmanageable situations.

The trade union elites who sing and dance on weekdays are not off work now.

I am preparing condolences for going to the front line tomorrow, and I have to take pictures to keep them.

On the forensic side, it was a little easier.

Song Kun's cause of death was determined, and no autopsy was performed after consulting the family members.

Autopsy is actually different from what most people imagine.

It doesn't mean that if there is a murder case, it must be dissected.

Only in some cases where the cause of death is uncertain and the time of death is uncertain, will the autopsy be performed after seeking the consent of the family members of the corpse.

Of course, if the family members of the unknown corpse cannot be found, an autopsy must be performed.

At 03:30 in the middle of the night, the four sets of tire track analysis were finally completed.

(End of this chapter)