National Forensic Doctor

Ordinary fingerprint inspection is done on backlog of fingerprints. After the results are obtained, they must be submitted to fingerprint experts for review.

Some provinces and cities have special organizations such as "Fingerprint Expert Committee" to perform fingerprint review work. However, most of them feel that it is a waste of expert manpower. They adopt the model of collecting data by dedicated personnel, then assigning it to experts, and then summarizing opinions, such as in Shannan Province.

However, during the fingerprint battle, there is no need to take off your pants and poop. Everyone present is an expert. If I skip these experts and go to other experts, it will not be a trouble, but it will also arouse everyone's doubts-could it be that I actively participated in the battle organized by the provincial department, but my expert qualifications were questioned.

At the same time, it is also to increase the fun of work for everyone and help everyone learn from each other. The fingerprint review during the fingerprint battle is conducted by the experts present.

As long as 11 experts complete the review each time and a majority of votes "agree with the determination", the fingerprint comparison will be considered successful. The fingerprint office of the provincial department can send a letter to the local criminal police team to organize manpower to arrest.

However, even if 11 experts complete the review, the fingerprint match will still exist in the system, waiting for review by other experts.

If subsequent experts continue to choose "agree to identify", or if most people choose "agree to identify", it will not affect the subsequent operations of the fingerprint matching. However, in the entire process, if someone chooses "identification and exclusion", they may enter a new round of discussion and judgment.

Because of this, the option of "determination and exclusion" must be judged very carefully. Only when there is strong confidence and basis for judgment will someone choose it.

The uncle next to Jiang Yuan, Li Zemin, immediately clicked on the system's message prompt. He has always entered the state relatively late, and it is also because he is older and cannot win over young people, so he is used to fishing for fish in the first few days. It usually takes three or four days after the fingerprint battle before he slowly starts to exert his strength.

However, Li Zemin is still very concerned and curious about the identification of other fingerprint experts.

In the target fingerprint database of Fingerprint Battle, any fingerprint is not simple. Most fingerprints are actually key fingerprints that have been read and compared by experts.

No county bureau would easily release the key fingerprints of a major case to the provincial department without repeated attempts.

And the experts in the fingerprint battle are naturally not fuel-efficient lamps.

As experts in the fingerprint inspection position, who are leaders in a province and have accumulated a lot of experience and professional skills, they will first choose the method they are best at and select the fingerprints that they are most likely to match successfully, and then spend many hours, It even took many days to try to match the fingerprints.

Most fingerprint experts are considered relatively successful if they can complete one or two such matches within 14 days of a fingerprint battle.

In order to complete such a match, fingerprint experts naturally have to do their best.

What Li Zemin likes to see the most is the colleagues around him trying their best and pretending to be nonchalant.

In the system message, there are a total of 12 prompts, representing 12 cases of backlogged fingerprints that have been compromised.

Li Zemin has already agreed with all the previous 11 points. There is nothing to say about this. The first batch of completed fingerprints were carefully studied and reviewed by experts. Very few people are willing to spend a long time to obtain a "determination and exclusion" from others.

As for the latest system message, when you click on it, the two fingerprints that pop up are not what Li Zemin expected. With a little judgment, you can confirm that the two are the same.

Forward comparison is relatively easy. It is like asking an ordinary person to find two pigs that look the most similar among a group of pigs. That is naturally very difficult. But if you bring two pigs over and ask them if they look similar, most people will be able to give a reliable answer.

Let alone an expert.

Li Zemin operated the mouse lightly and clicked "Agree" on the latest system message.

Then, Li Zemin looked at the specific fingerprint information.

At this time, Li Zemin discovered that the "identified" signatory of the fingerprints was Jiang Yuan next to him.

"Good guy, you're lucky." Li Zemin muttered, and then continued to look at the fingerprints.

The first thing Li Zemin saw was the quadrilateral fingerprint structure. He smiled unconsciously and praised Jiang Yuan's luck again.

However, when he saw the details of the characteristic points of the two fingerprints, Li Zemin couldn't help but frown.

Good guy, good guy...

Li Zemin couldn't help but turn his head, looked at Jiang Yuan, and said, "The fingerprint matching you did was not chewed by software?"

The matching of software systems has its own rules. The most basic principle is how many feature points are matched. For a more advanced one, it can be a scoring system, and it will be released after reaching a certain number of points.

But Li Zemin looked at the two fingerprints, and when they were put together, they couldn't even match the characteristic points.

However, judging by human standards, or in other words, not simply comparing feature points, but comparing structures such as points, lines, and surfaces, it can indeed be determined to be the same.

This can be said to be a very honest fingerprint matching method. In the era before automatic matching by computer systems, everyone used a similar method.

It's just rarer now.

Jiang Yuan's eyes were fixed on the screen, while operating the mouse, he said: "When I was looking at other fingerprints, I suddenly saw them. I pulled them over and compared them, and they matched."

"Then your fingerprints are very good." Li Zemin smiled. He quite understood what Jiang Yuan said. With fingerprints with such a special quadrilateral structure, it is still relatively normal to compare them when he encounters them occasionally.

But if we really talk about the fingerprint structure, a fingerprint is so small, with an area of ​​one centimeter square. In addition to fingerprints with a quadrilateral structure, there may also be fingerprints with a pentagonal, hexagonal, circular, etc. structure. You have to have a deep understanding of fingerprints. Only memory can do this.

"Good luck." Jiang Yuan responded, very polite.

Li Zemin laughed, tapped Jiang Yuan with his hand, and said: "It's better now. You have already achieved a result when you come to the fingerprint battle at such a young age, and you won't have any pressure anymore. The pressure has been given to you." We are old men.”

While he was speaking, someone else agreed with Jiang Yuan's "identification", and the "ranking list of solved cases" displayed on the projector on the wall in front of the office was immediately updated.

Jiang Yuan's name rose by more than twenty people in one breath and reached the middle position.

And the word "1" definitely appeared on his right side of the result.

Li Zemin's name is still lagging behind, and there is only one "0" in the result, but he is not in a hurry. It has never been difficult to go from 0 to 1.

Li Zemin even had time to continue looking through the cases that had just been identified as the same.

"It's the rape of an underage girl in Miaohe County. This person must have committed three crimes here and there. I think he's a bit familiar!" Li Zemin took a breath and shouted.

Many people looked over, but most of them just heard the noise and were touched. Among the backlog of cases accumulated by the provincial department, there are many major and important cases, and human memory is always limited.

However, there was a trace inspection from Miaohe County in the office. At this time, he couldn't help but stood up, walked over and asked: "Have you broken the 515?"

"It's not me. Jiang Yuan won the competition. He's from the Ningtai County Bureau." Li Zemin gave in and introduced Jiang Yuan: "Qian Mingyu is a fingerprint expert in Miaohe County and has been a police officer for 20 years."

"It's no use even 20 years. I've been following the 515 case for several years. The three victims were all middle school students. After the case happened, parents came to our bureau many times. Later, the victims also stayed in the county. I couldn't live anymore, and they moved away one after another, so I occasionally called to ask..." Qian Mingyu, who was slightly younger than Li Zemin, was feeling sad at this time.

Jiang Yuanping said straightforwardly: "I came across a quadrilateral fingerprint. After comparing it, I found that they are the same."

"Let me see, where are you from?" Qian Mingyu was familiar with Li Zemin and looked directly on his computer.

Li Zemin gave up his seat, took a look at it, and said, "The one in Wanxiang City is a bit far away."

Wanxiang City and Miaohe County, one to the west and one to the east, are considered to straddle the boundary of Shannan Province.

Qian Mingyu said "yes" heavily, nodded to Jiang Yuan, took out his mobile phone, and said: "Let me tell our captain that this case has been troublesome in our county for a long time."