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

Chapter 192 Suspected Suspect

After lunch, more than a dozen people didn't go back to rest, and the atmosphere in the fingerprint battle meeting room was a bit depressing.

It's like before the storm comes, the thick clouds are pressing on the top of the head, there is no wind, no rain, only breathless depression.

What Wang Hui said just now made everyone feel a little heavy again.

Lu Chuan sighed and forced himself to focus on the computer screen.

Fortunately, the case is solved.

The child's spirit in heaven will eventually rest in peace.

third case.

After the battle, there were a total of more than 80 murder cases in the fingerprint library. Lu Chuan excluded a few in Haizhou City. He did a comparison last month. After finding no target fingerprint case in the system, he randomly selected one.

The fingerprints this time are more blurred than the last two.

There is only a narrow one less than half a centimeter wide.

The ridges twisted and squeezed together, and the entire fingerprint seemed to be crushed by the crack of the door.

Fortunately, although the lines of the fingerprint are squeezed together, they are not very blurred.

This time, Lu Chuan did not adopt layered image processing, but needed to stretch and deform the narrow fingerprints to become normal fingerprints.

Here, it is difficult to use mathematical transformation methods to work.

Because the fingerprint lines are relatively clear, they are just squeezed together. There is a special analysis method for such fingerprints in Lu Chuan's advanced fingerprint identification and analysis skills.

That is to stretch according to the regular characteristics of the fingerprint.

Although everyone's fingerprints are unique, there are still certain rules for the growth and development of fingerprints for people of different ages and genders.

The length of the ridge line and the width of the interval, in terms of probability, have certain rules to follow.

What Lu Chuan needs to do now is to roughly judge the width of the fingerprint ridge lines according to the length of the fingerprint and the width of the ridge lines, so as to stretch the fingerprint.

This is also what other experts who have studied this fingerprint have done.

However, compared with technical pre-processing fingerprints, this fingerprint processing method is more test of experience.

Only after experiencing enough fingerprints can one subconsciously make a suitable and accurate judgment.

Although the number of fingerprints identified and analyzed by Lu Chuan in reality is not many, the experience rewarded in the system skills is not a lot at all.

Drag the fingerprint into the PS image processing interface, Lu Chuan zooms in on the fingerprint, starts from the center and pulls out the fingerprint, gradually zooms in, and adjusts the width of the ridge line.

There is an important point here, which is to zoom in from the center of the fingerprint, although this is the place where the fingerprints are most densely stacked, it is difficult to start.

But that is because there are too many fingerprint ridges, and the stacked vision causes false feelings.

In fact, since the closer to the middle of the fingerprint stack, the smaller the space that can be compressed, so the distance between the fingerprint ridge line in the middle is closer to the width of the suspect's real fingerprint than the outer edge.

The adjustment range will also be very small. In this way, gradually stretching from the inside to the outside can be the most accurate approach to the real fingerprint.

But if you start from the periphery, although it feels much easier, in fact, after cleaning up a few ridges, you will find that the fingerprint ridges that have been cleaned at the periphery will not automatically extend, so they will be stacked again.

Therefore, it is necessary to re-clean the peripheral ridge line in turn.

To a certain extent, because it cannot be put in place directly at one time, it will cause stacking, repeated cleaning, and then stacking...

Going back and forth, a vicious circle.

And because each extension is done by the appraiser based on experience, even an expert-level fingerprint appraiser cannot guarantee that every time his experience is accurate.

Deviations will naturally appear after a few more times, and the difficulty of identification and analysis will increase geometrically.

In the end, just like now, three or five years later, the fingerprints still cannot match the suspect.

Of course, when Lu Chuan stretches the ridge line from the inside to the outside, he can only stretch the middle part, and the outer ridge line will not automatically stretch outward.

But what Lu Chuan wants to do is not to stretch the entire fingerprint, as long as a small part in the middle, even a tenth of the size, is enough for identification.

Although such a small area may not be able to mark enough feature points to become judicial evidence, as long as there is a direction, there are still on-site criminal police.

As long as the target can be locked according to the fingerprint, the rest will continue to dig.

For example, in the murder case of Chen Xiaosong, his stepfather was identified by fingerprints. In fact, during the interrogation, it was found that his mother was also an accomplice.

Solving crimes by the police is never a place to fight alone, nor is it a place to show off individual heroism.

Sincere cooperation and united combat is the kingly way.

At the same time, Tianzhou Criminal Investigation Detachment.

The head of Wang Chuanmin's detachment personally took command. After receiving a call from Li Donglin of the Criminal Investigation Division [-] of the Provincial Department, he immediately organized an action team to prepare for the arrest operation.

"The other party is suspected to be the murderer of the taxi driver serial murder case 12 years ago!"

Before the action, Wang Chuanmin held a mobilization meeting in the conference room.

"According to the information we have obtained in the past, the other party has extremely strong reconnaissance and anti-reconnaissance capabilities. During the arrest process, we must be cautious."

"Everyone, body armor and firearms are ready!"

"set off!"

No. 28, Minzhu Road, Sainty Jinmao Building.

"The suspect is on the 28th floor. He is an executive of an economic and trade company. We just confirmed through cleaning that he is inside."

Zhao Ming, the leader of the action team, has confirmed the other party's situation.

"action!"

"Yes!"

13 minute later.

From the elevator, Zhao Ming and others escorted Xu Wenbing, who was wearing a hood, out of the elevator.

The arrest process was not smooth. When Xu Wenbing saw the police suddenly break into the office, he resisted violently.

This Xu Wenbing not only has a strong sense of reconnaissance and anti-reconnaissance, but also a master of fighting.

The four heavily armed criminal policemen who entered Xu Wenbing's office together were almost robbed of their guns by the other party.

If Zhao Ming hadn't hugged the opponent's lower back at the critical moment, he resisted two elbow strikes and didn't let go.

Maybe it will cause irreparable consequences.

Now, Zhao Ming still felt as if his back had been hit by a car, grinning in pain.

"Are you okay?"

Zhao Ming shook his head: "It's okay, it's just that it hurts so much, I don't know how this kid practiced his skills so fiercely!"

"Fierce? This guy was the champion of free Sanda in our city 20 years ago, and he has also run marathons for nearly ten years."

Zhao Ming shook his head, this person is really hard to catch.

"By the way, Captain, I heard that the fingerprints were compared by Lu Chuan of the Haizhou Criminal Investigation Detachment?"

Lu Chuan's reputation in the Tianzhou City Criminal Investigation Detachment is quite high.

Wang Chuanmin smiled: "Not only that, he also won a case in Qianzhou City in the morning, and two murder cases in one morning!"

Although the other party was difficult to deal with, he was finally arrested. While the two were talking, the suspect was escorted into the car.

Interrogation began immediately.

At 04:30 in the afternoon, just after the Tianzhou Criminal Investigation Detachment's operation had just ended, in the fingerprint battle meeting room, Lu Chuan stretched long.

After more than three hours, the fingerprint was finally done!
(End of this chapter)