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

Chapter 99 Fingerprint Information
Lu Chuan's age seemed to be in his early 20s.

Being able to join the task force set up by the provincial department at such a young age, Wang Hao is someone who has experienced it, so he took it for granted that there was someone behind it.

Otherwise, he also knows Liu Guodong, who is currently surveyed in Haizhou City. The two of them once participated in the fingerprint battle organized by the provincial department, and they were tied for the last comrades in arms.

Of course, the two of them were not the only ones who tied for the bottom one. Under normal circumstances, there would always be seven or eight people.

After all, not everyone can successfully compare fingerprints in every battle.

This requires luck, but also strength.

Liu Guodong of the Haizhou Criminal Investigation Detachment did not join the task force, but a young criminal policeman like Lu Chuan joined.

What this means, Wang Hao naturally has guesses.

However, this has nothing to do with him.

In particular, Lu Chuan picked up the low-level work of surveying and taking pictures, which greatly improved Wang Hao's senses.

No matter how you got into the task force, if you have insight and know how to respect your predecessors, you are a good comrade.

But as he was doing it, Wang Hao realized something was wrong.

Lu Chuan’s on-site survey and photographing process is very standard, and the selected points are just right. All the marked points do not need to be pointed out by himself, and everything is in order.

This is not the performance that a young team should have.

Later, Wang Hao had such a contrast.

Twenty minutes ago, Lu Chuan changed a camera.

Wang Hao knew that thing, and the current investigation office of the Binzhou Criminal Investigation Detachment also had it.

Fingerprint camera.

Different from ordinary cameras, fingerprint cameras are special cameras designed for criminal investigation departments.

There are many types of fingerprint cameras, and their common features are fixed focal length, accurate one-to-one ratio shooting system and lighting device with its own power supply.

Fingerprint cameras are easy to operate and flexible to use, but the penetration rate is not high. Because they are relatively expensive, ordinary cameras are mostly used to take fingerprints.

Wang Hao was not surprised that Lu Chuan could take out or use the fingerprint camera.

Instead, he was surprised at the fingerprint collection that Lu Chuan was doing. If he read correctly, Lu Chuan collected fingerprints on a rubber glove that was found out of the trash can and took a photo.

He has just inspected it, and the entire operating room is very "clean".

Operating table, shadowless lamp, floor, surgical instruments, etc.

He has observed all possible places, and basically found no valuable fingerprints.

The only few are also scratches, which are not worth collecting at all.

As for collecting fingerprints on rubber gloves, Wang Hao never thought about it.

Can't do it.

But Lu Chuan not only did it, but also explained it to him.

The economic development of BZ City is similar to that of Haizhou, or a little behind.

Therefore, the current survey and trace inspection of the Binzhou Criminal Investigation Detachment are also two brands of one team.

Wang Hao also works part-time in spot surveys and trace inspections. He feels a little emotional for Lu Chuan, a young and capable junior who has just graduated and started working.

Lu Chuan didn't have as many ideas as Wang Hao. The operating room transformed from the basement was obviously the "first crime scene".

Although the other party cleaned the operating room after the "surgery", many traces could not be eliminated by rough washing with water.

Advanced fingerprint identification analysis brought Lu Chuan not only the ability of simple fingerprint identification.

Just like the image processing of fingerprints, Lu Chuan can be used not only on fingerprints, but also on other physical evidence analysis.

"Brother Wang," Lu Chuan was not polite. The basement of more than 100 square meters, if Lu Chuan did the site survey alone, he would not be busy at all.

Wang Hao can just help: "Although the other party has cleaned up the operating table, instruments, and shadowless lamps, there are still some fuzzy fingerprints left, and there are some traces left in the cracks on the ground, the cracks in the corner tiles, the entrance of the sewer, etc. .”

"Well, I'll wipe my fingerprints first, and you can hold the fluorescent lamp for me."

Wang Hao naturally took the fluorescent lamp from Lu Chuan's hand and shone it on the edge of the operating table.

A fuzzy mess of fingerprints, like a lump of shit, appeared in sight.

This kind of fingerprint cannot be extracted by using commonly used methods such as powder and magnetic powder.

Blurred fingerprints, superimposed and distorted lines, due to the intervention of external forces, the deformation is very serious.

Ordinary extraction methods can only get a cloud of shadows, and there is no way to carry out later identification and analysis.

Lu Chuan's method is much simpler, taking photos directly, and then using image processing in the later stage to extract fingerprints in layers, which can increase the probability of successful identification.

Wang Hao took over the fluorescent lamp and officially started working with Lu Chuan.

Let's start, this is something that Wang Hao can only do when he first went to work.

However, Lu Chuan's technique is really delicate, and Lu Chuan worked for a full two hours on an operating table.

Of course, the result is also gratifying.

Three fingerprints that blurred into three pieces of shit have been collected.

In addition, some dried blood samples were collected from the gaps in the wheels of the operating table.

The next thing was much simpler. Lu Chuan, lying on the ground, buckled the cracks of the floor tiles one by one.

Wang Hao found a small bench, squatted next to Lu Chuan, and watched him use tweezers to pick out lumps of dirty things that I don't know what they were from the cracks in the floor tiles.

The current survey work is boring, but also interesting.

The seemingly "clean and tidy" basement hides the subtle traces of crime and crime.

The pre-trial of Chen Gang by the Binhai Criminal Investigation Detachment is still going on, and the work of Lu Chuan and Wang Hao has finally come to an end.

Four thirty-three in the morning.

Lu Chuan grinned as he supported his waist, which was already a little stiff.

But looking at the evidence in a cardboard box, the smile on Lu Chuan's face was still satisfied.

The dirty things dug out from the ground were filled with 72 evidence bags.

There are still some hairs in the sewer, and some skin flakes have been extracted from the joint between the sink hole and the basin of the sink.

In addition, there are thirteen fingerprints.

"Brother Wang, I'm not very good at evidence inspection and analysis. You need to spend some time on DNA testing. I'll identify fingerprints."

Wang Hao nodded numbly, and has been doing field surveys for more than ten years. To be honest, Wang Hao rarely sees Lu Chuan's meticulous operations.

Wang Hao can do things like button the floor, wipe the toilet, rub the sink, etc.

What made Wang Hao admire Lu Chuan was the method Lu Chuan used when collecting fingerprints.

Many of them are methods that he has never seen or heard of.

But the effect is obvious, and the thirteen fingerprints are the most powerful illustration.

"Okay, leave the DNA extraction to me, it's just these fingerprints..."

Thirteen fingerprints, although the number is quite a lot, but the quality is really indescribable.

If a normal fingerprint sample is 1.7 meters tall, weighs [-] kilograms, a slender, smooth, long-haired beauty with protruding back.

The fingerprint collected by Lu Chuan this time... should be Yang Sen's niece.

He is 1.5 meters tall, weighs [-], and has a bald, pockmarked face with teeth.

I really can't say anything.

"It's okay, I have a solution."

Lu Chuan is full of confidence, advanced fingerprint identification and analysis, he is not shy!

(End of this chapter)