Lu Chuan's age looks like he is in his early twenties.

Wang Hao is a person who can enter the task force set up by the provincial department at such a young age, and it is natural to think that there is someone behind it.

Otherwise, he also knew Liu Guodong, the current survey of Haizhou City, and the two had participated in the fingerprint battle organized by the provincial department together, and they were tied for the first place in arms.

Of course, there are not only two of them who are tied for the bottom of the list, but under normal circumstances, there are always seven or eight people.

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

It takes luck and, more importantly, strength.

Liu Guodong of the Haizhou Criminal Investigation Detachment did not participate in the task force, but a young criminal police officer like Lu Chuan participated.

What does this mean, Wang Hao naturally has a guess.

However, it has nothing to do with him.

Especially when Lu Chuan got started, he picked up such a low-level job as taking pictures of the spot, which greatly improved Wang Hao's senses.

No matter how you get into the task force, people have the vision to see and know how to respect their predecessors, and this is a good comrade.

But while doing it, Wang Hao found that something was wrong.

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

This is not the performance of a young man.

Later, Wang Hao had a contrast like this.

Twenty minutes ago, Lu Chuan changed his camera.

Wang Hao knew that thing, and the Binzhou Criminal Investigation Detachment Investigation Office also had it.

Fingerprint camera.

Unlike regular cameras, a fingerprint camera is a special camera designed for criminal investigation departments.

There are many different types of fingerprint cameras, and they all share the same features as fixed focal lengths, accurate 1:1 ratio shooting systems, and self-powered lighting.

Fingerprint cameras are easy to operate and flexible to use, but the popularity rate is not high, because they are more expensive, so most of the fingerprints are taken with ordinary cameras.

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

Instead, he was surprised that Lu Chuan was doing fingerprint collection, if he was not mistaken, Lu Chuan was collecting fingerprints on a rubber glove that was detected from the trash can for photography.

He had just surveyed and the whole operating room was very "clean".

Operating tables, shadowless lights, floors, surgical instruments, etc.

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

The few that are there are also scratches, and there is no value for collecting them at all.

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

It can't be done.

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 it is a little behind.

Therefore, the current investigation and trace inspection of the Binzhou Criminal Investigation Detachment are also a set of two brands.

Wang Hao is also a part-time job in field investigation and trace inspection, and he has some feelings for Lu Chuan, a young and young junior who has just graduated and joined the work.

Lu Chuan didn't have so many ideas from Wang Hao, and the operating room renovated from the basement was obviously the "first crime scene".

Although the operating room was cleaned after the operation, many of the marks could not be eliminated by rough water washing.

Advanced fingerprint identification analysis brings Lu Chuan more than just the ability of fingerprint identification.

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

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

Wang Hao can just help: "Although the other party has cleaned up the operating table, instruments and shadowless lamps, there are still some blurry fingerprints left, and there are some traces left in the cracks in the ground, the gaps in the tiles in the corners, the sewer entrances and other places. ”

"In this case, I'll wipe my fingerprints first, and you can help me get the fluorescent light."

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

A blurry mess of fingerprints that looked like a piece of appeared in sight.

There is no way to extract this fingerprint using commonly used methods such as powder and magnetic pink.

Blurred fingerprints, superimposed and distorted lines, deformed very seriously due to the intervention of external forces.

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

Lu Chuan's method is much simpler, directly take pictures and collect, and later use image processing to extract fingerprints in layers, which can improve the probability of successful identification.

Wang Hao took over the fluorescent light and officially began to work with Lu Chuan.

Let's get started, this is still something that Wang Hao did when he first went to work.

However, Lu Chuan's technique is really fine, and Lu Chuan did it for two hours on an operating table.

Of course, the results are also encouraging.

Three fingerprints, blurred into three pieces of, have been collected.

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

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

Wang Hao found a small bench, squatted next to Lu Chuan, and watched him use tweezers to pick out a dirty lump of dirty stuff that he didn't know what it was.

The work of the field survey is boring and interesting.

On the surface, the basement looks "clean and tidy", and there are subtle traces of sin and crime.

The pre-trial of Chen Gang by the Binhai Criminal Investigation Detachment continued, and the work of Lu Chuan and Wang Hao finally came to an end.

4:32 a.m.

Supporting his waist, which was already a little upright, Lu Chuan bared his teeth.

But looking at the evidence full of cardboard boxes, the smile on Lu Chuan's face was still satisfied.

The dirt that was cut out of the cracks in the ground contained seventy-two bags of evidence.

There was still some hair in the drain, and some dander was extracted from the sink hole where the basin and the basin combined.

In addition to this, there are thirteen fingerprints.

"Brother Wang, I'm not very good at evidence testing and analysis, you have to worry about DNA testing, I'll identify fingerprints."

Wang Hao nodded a little indifferently, he has done more than ten years of field surveys, to be honest, Lu Chuan's meticulous operation, Wang Hao is rare.

Buckle the floor seams, wipe the toilet, rub the sink or something, Wang Hao will also.

What made Wang Hao impressed with Lu Chuan was the method used by Lu Chuan when collecting fingerprints.

Many of them were methods he had never seen or heard of.

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

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

Thirteen fingerprints, although there are a lot of them, but the quality is really indescribable.

If a normal fingerprint sample is a long-haired beauty with a height of 1.7 meters and a weight of 50 kilograms, slender and smooth, convex and backward.

The fingerprints collected by Lu Chuan this time ...... It should be Janssen's niece.

He is 1.5 meters tall and weighs 18, plus a bald pockmarked face with violent teeth.

I really can't put it down.

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

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