Chapter 1324

"Shen Yaowei opened a video call, do you want to see it?" Wang Chuanxing walked up and asked Jiang Yuan softly.

"Shen Yaowei followed group 6?" Jiang Yuan raised his head.

"Yes, the luck is really good." Wang Chuanxing was really a bit envious. Following the group to these 8 locations, on the one hand, it is to reduce the criminal investigation pressure of the Anwan City Bureau, and on the other hand, it is to lead the credit.

This time it is equivalent to a joint mission between Shannan and Pingzhou. The Pingzhou Provincial Department has their reward system, and Shannan also has its own merit book. Not going is also a waste.

However, the one who can really share the pork is only one person, all depending on luck. Group 6 hit it, then Shen Yaowei who followed the group can at least get a commendation, and if he can gather it, a third-class merit is also very easy.

"Team Jiang, we are now pressing fingerprints for the suspect." Shen Yaowei wore a police uniform, saluted Jiang Yuan, and switched the video to the front camera.

A man with a clean and non-greasy face and blue veins on his arms with tattoos was placed in the center of the video screen.

From the perspective of the police, this kind of person also has to say that the experience is complex. Those who are not complex enough cannot get such a large area of beautiful tattoos, and cannot practice the psychological quality of 10 police officers adding to the body and looking calm.

Two criminal police officers clamped the suspect left and right, the person on the right held his hand, and pressed his fingers on the palm print instrument to roll back and forth.

Human fingerprints are not just the front, the sides also have fingerprints, and they are often places that are easy to reveal flaws.

After pressing ten fingers, the criminal police at the scene asked him to press his hands and side palms. The principle is the same, that is, the area is much larger.

"Report to the command headquarters, group 6 completed fingerprint pressing." Shen Yaowei put his mobile phone on the table and respectfully saluted the camera.

The police officers who accompanied also saluted. Everyone knew that Jiang Yuan was watching on the opposite side, and everyone's expressions and actions were very serious.

The criminal suspect who had been re-handcuffed was a bit confused, his expression sank, and then his face changed, and he shouted loudly: "Leader, I am wronged, they violated my privacy, and coerced me, and... and hit my stomach..."

"Let the prosecutor intervene in advance later. Send the file." Jiang Yuan's two short sentences were also for Shen Yaowei.

"Yes." Shen Yaowei hurriedly opened his notebook, connected the palm print instrument, and then packed all the data inside...

The requirement of 1000dpi is not low. At least in terms of the equipment and instruments currently in the country, most of them cannot reach it. Shen Yaowei and others also specifically selected newer models.

The criminal suspect realized that the situation was not good, and shouted again.

The police officer standing next to the video call mobile phone silently lowered the volume of the mobile phone.

And in Jiang Yuan thousands of miles away, he had already asked people to take the mobile phone away. After Wang Chuanxing adjusted the format of the received file, Jiang Yuan directly opened the newly collected fingerprints and compared them one-on-one.

Theoretically, comparing such fingerprints does not even need to mark feature points. Many ancient criminal police in the past also mastered such fingerprint comparison techniques. Facing the suspect, they took out the fingerprint card prepared long ago, and then let the other party press a fingerprint, and compared it on the spot. Why not use mobile phones or laptops and the like? Because it hasn't been invented yet.

The comparison work Jiang Yuan is doing now is essentially no different. It is just using a high-definition system, seeing the three-level features of fingerprints, thereby raising the cost of fingerprint identification from 1 cent fingerprint card to the million level, and...

He can use a smaller area of fingerprints to prove that this pattern belongs to this person.

Among the three-level features of fingerprints, the most useful is sweat pore features. Every hole on everyone's body is different, just like nostrils and eyes, no one can grow two identical nostrils and eyes.

Therefore, when a criminal science technician gets a piece of fingerprint, if he can examine the sweat pore features, you only need a very small piece to serve as an argument.

In addition, it is actually the most important point. Sweat pore features are almost the largest category among the three-level features of fingerprints. Outside of it, whether it is the width of the texture, the edge morphology of the papillary texture, etc., they all need a larger magnification to be more clearly displayed.

It is equivalent to saying that 1000dpi is not enough, then 1500 or even 2000 is needed, otherwise, the error rate will be too high—especially for countries like the United States, if a project has a high passive error rate, then there will definitely be people, including those inside and outside the law enforcement system, who will take the form of mixing fish and eyes, creating a high active error rate, so as to achieve ulterior motives.

"Confirm the same."

In the breath-holding and concentration of the crowd, Jiang Yuan completed the comparison.

The fingerprints collected on the clothes are discontinuous residual fingerprints, which are a huge destruction to the second-level features of fingerprints, but basically do not affect the three-level features. Although Jiang Yuan spent a very short time, he actually chose several positions and verified them many times before determining.

After all, he determined it here, and the suspect on the other side should be arrested. It is very troublesome to make a mistake.

Liu Zhuangshi, who had been waiting on the side, immediately picked up his mobile phone and called the front-line group 6.

Shen Yaowei just followed to help, and the leader was naturally from the Anwan Criminal Police Detachment.

Wang Chuanxing took the mobile phone again, turned up the volume, and showed it to Jiang Yuan and others.

In the video call that remained connected, the suspect's roar came again.

He actually realized that he was about to face punishment, especially when the initial fluke was proved impossible, the moment all the worst predictions were about to be realized, the only thing he could rely on was strength!

"Ha..."

On the screen, the suspect exerted force with both arms, blue veins straight, and even his tattoos seemed to be trying to become three-dimensional.

If it were the opening game of the movie world, he might really have a chance, but in today's scene, the Chinese police officer is just worried that he will hurt himself, so he hurriedly pacified him: "Don't be excited, it's okay, as long as we figure out the situation, you can go back first..."

While lying to him, the police officers on the left and right sides stretched out their electric batons.

Shen Yaowei watched the electric baton approaching, and couldn't help but dub for himself: "Chi chi..."

The suspect straightened his waist, chest, and then stretched his neck, like a shrimp, shaking from bottom to top.

Then, the room became quiet.

The suspect stopped shouting, and the police officer who persuaded him didn't need to talk nonsense anymore.

"We are taking people back." The leading criminal police officer reported to Liu Zhuangshi, and after getting permission, he clamped the suspect and went out.

And in the conference room of the battle, until Liu Zhuangshi put down his mobile phone, his eyes were bright, like the expression of his daughter wanting a toy at the age of five, and stretched out his hands to Jiang Yuan: "Director Jiang, we still have many evidence containing fingerprints!"