Early the next morning, eight o'clock.

The sky was bright, and Lu Chuan, who had slept for four or five hours, although he had not completely recovered, could continue to survive.

Yesterday, after analyzing the footprints found in the ravine overnight, the four sets of tire tracks on the side of the road were just appetizers.

The highlight is today, with a site survey of the incineration vehicles.

There are many ways to destroy the scene, blisters, burials, etc. are common methods in homicides.

For example, the sunken corpses in the reservoir and the burial of corpses under the highway.

Of all the ways to destroy evidence of crimes, fire can be said to be the most thorough in cleaning up traces.

In the general field survey, the most annoying thing is to encounter the scene of the fire.

For example, in the last arson case in the southern suburbs, if you want to extract fingerprints at the scene of the fire, you can't do it without some special means.

The ravine near the newly built village.

Last night, the police from two nearby police stations watched over me for a night.

When Lu Chuan and the others came, the two policemen were nested in the police car on the side of the road.

If you want to talk about being a person, you have to be white.

What the old man said was true, when he brought buns in the cafeteria just now, Lu Chuan thought that the other party was not full.

"Brother, have some buns."

The police at the police station who took care of the scene were auxiliary police, and they were a little flattered when they received Lao Bai's buns.

Thank you again and again.

Lu Chuan returned to the professional car and took out two packs of Chinese cigarettes from his hand: "The two of you work hard. ”

As a new neon in the survey, Lu Chuan put a lot of good cigarettes in any place or car that belonged to the survey office.

Liu Guodong and the others were embarrassed to smoke his cigarettes all the time, so he could only do so.

I can reach out and take it, and many of them are still opened, and they dry without smoking.

When the other party saw Huazi in Lu Chuan's hand, surprise flashed in his eyes, and the criminal police were better than ordinary policemen.

The head of their police station doesn't necessarily smoke Huazi every day.

"Officer Lu, let's just smoke this."

The tall auxiliary police saw Lu Chuan at the scene yesterday, and knew that he was the criminal police officer of the criminal investigation detachment, so he took out his red plum, and the auxiliary police waved his hand.

"You're welcome, squatting for a night, hard."

After saying that, he threw the cigarette into the police car and went straight down the ravine.

With Baozi and Huazi, the two auxiliary policemen were full of stomachs and spirits.

Following Lu Chuan, they entered the ravine.

Liu Guodong stood in front of the off-road vehicle that had been landed, looked at it carefully, and sighed after a while.

"Do your best to obey the destiny of heaven and work!"

Lu Chuan opened the survey box he was carrying, put on three layers of gloves, and focused on observing the situation in the driver's seat.

Fingerprint on the steering wheel...... Don't think about it.

The rubber has been burned, not to mention Lu Chuan's intermediate fingerprint collection skills, even if it is a high-level one.

The carrier is gone, and the fingerprints can still be collected, which is fantasy.

But when you drive, you don't just leave fingerprints on the steering wheel.

Fingerprints may be left on the gear handle, handbrake, door handle, etc.

Lu Chuan mainly observed some metal parts that were not burned.

These places, with their smoke and fire, have turned black.

It is very difficult to collect fingerprints.

Liu Guodong and the others knew that Lu Chuan had a hand in collecting fingerprints, so the work was handed over to him.

The three were surveying the front of the car.

"There are still blood stains left in this area, collect it."

The vehicle burned and exploded, but not all evidence was destroyed.

The bumper impact was still there, and there were bits and pieces of dried blood in the cracks.

When the murderer burned the vehicle, he sprayed gasoline inside and out, which made the vehicle burn more fully.

The interior has been completely melted apart, and the seats are only supported by iron shelves.

All the lights were melted, and the plastic parts were largely untouched.

Fortunately, the combustion of the vehicle was not due to the impact, so the engine part was just overfired, and the rubber sleeve was burned out, but it was not completely damaged.

"Xiao Lu, how is the inspection?"

Lu Chuan, who was halfway into the carriage, sighed: "The interior inside is completely ruined." ”

"The paint is burned, and there is basically no possibility of fingerprints extracting from door handles and car surfaces."

"I found some curly plastic debris underneath the dashboard to see if I could find fingerprints from the inside."

The burn damage to the vehicle was worse than expected.

Fortunately, Li Kai didn't use a fire extinguisher when they found out yesterday, otherwise they wouldn't have to look at anything.

There were only two takeaways from the vehicle's survey.

Suspected blood residues were found in the gap after the front bumper was shattered.

It is most likely the traces left by Sun Kun when he was hit, and because it is hidden in the gap of the vehicle frame, although it has been scorched by high temperature and has dried up, it can still be collected.

Another one is a curly interior panel found by Lu Chuan, and it is no longer clear from the appearance what position it once belonged to.

But after curling, the interior may be relatively intact.

Take it back and dispose of it, and if you're lucky, you can collect fingerprints.

After the investigation of the vehicle, Liu Guodong called the traffic police team to tow the car away.

This kind of vehicle involved in the murder will be sealed in the special parking lot of the traffic police detachment.

When the case is solved, when will the next step be processed.

Survey laboratory.

Liu Guodong is processing the collected bloodstains.

"DNA information testing can't be done, but blood type can be determined."

Lu Chuan nodded, the detection of blood group is judged by the singleness of the red blood cell surface antigen.

This antigen is essentially a protein, and although high temperatures can damage the protein structure, the chemical reaction will not disappear.

The final blood type test result is consistent with Song Kun's type A blood, which can prove that the burned vehicle is indeed the vehicle that hit Song Kun.

Of course, this is only one piece of evidence, and the debris scattered at the site of the impact can also be used as evidence.

The blood test has made some progress, but Lu Chuan's fingerprint collection has not gone well.

Although the fragments of the interior panel have been processed and the inner layer has been turned over, Lu Chuan's luck this time was a little worse.

The killer did not leave fingerprints on this piece of interior.

It can be said that the murderer's method of destroying his own traces by setting fire to the car was very successful.

Solving a case requires not only technology, but also luck.

When Liang Qi kidnapped the case, Lu Chuan's luck was very good, and he ran into the suspect when he was watching.

Of course, it can also be said that it is very bad, because he is a person who meets the suspect and is also found to be identified.

A week passed quickly.

The atmosphere in the criminal investigation detachment was very depressing, and everyone was staring at the black circles and chicken nests.

Qin Yong slept directly in the office for seven days and didn't go home for a day.

Ren Qiang, Sun Jun and other criminal policemen in the action group, let alone going home, even the office has not been back a few times.

Everyone, all rushed to the scene.

However, just like Lu Chuan, the luck of solving the case this time was checked.

There has been no substantial progress in the murder of Song Kun so far.

Of all the clues, there are still only two.