Chapter 829

While operating the mouse and comparing the fingerprints brushed out by the software one by one, Jiang Yuan looked up at the living room and said politely: "That... Team Leader Li and Team Leader Liu, drink some tea and rest. It's fine, you can browse your phones. I'm mainly encountering a small problem here, and I think it's better to have you local police here."

After being told this by Jiang Yuan, the two police officers immediately straightened their backs.

Among them, Liu Ling said: "Team Leader Jiang, it's fine, you go ahead and get busy. If there's anything, just call us... uh, do we have a case?"

"Yes, I just happened to encounter a case, and I didn't bring anyone with me. If you can help stay for a while, that would be the best." Jiang Yuan paused: "By the way, did you bring your guns?"

The smiles on their faces became visibly frozen.

Although China is not as exaggerated as Japan, where police officers take pride in not drawing their guns throughout their careers, as far as ordinary police officers are concerned, how many have held a gun while on duty since the year 2000? And how many have fired a gun?

In a county-level place like Sushan, let alone police station officers, criminal police officers don't encounter a chance to fire a gun all year round.

Li and Liu had originally come to deliver a gift and greet Jiang Yuan before leaving, but now...

The two exchanged glances frantically, fearing that they would become the gift themselves.

"If you have anything to say, just say it. You can play on your phones, but it's best not to communicate with the outside world, including your Station Chief Kong. Don't cause trouble for him either."

Jiang Yuan was half-serious and half-joking. If this case were completed smoothly, it would naturally be a happy ending for everyone, but if any news leaked and someone ran away, then from this moment on, every phone call they made and every message they sent would be subject to review.

The disciplinary requirements of the disciplinary forces are extremely strict when it comes to the crunch. The two police officers hurriedly sat up straight and agreed.

Logically speaking, they could actually ignore Jiang Yuan, but neither of them even considered that option.

Jiang Yuan didn't talk too much nonsense, turned his head, and continued to look for work opportunities for his colleagues who came by chartered plane.

There were more than thirty fingerprints on the fan. Jiang Yuan scanned them once, then categorized them, then selected some of them to mark feature points, and finally classified them into seven people.

If it were a new forensic examiner, marking such a fingerprint might take a quarter to half an hour. A skilled elite forensic examiner at LV1 level might be faster, but it would still take about 10 minutes. The difference is that the LV1 forensic examiner has higher accuracy and higher repeatability.

In other words, just marking the fingerprints on this one fan surface might be a workload of one or two days for an ordinary forensic examiner. In fact, it's even more than that, because there must be some difficult fingerprints that cannot be marked.

This is also why most of the fingerprints extracted in ordinary cases are key fingerprints, such as fingerprints on murder weapons, tools, vehicle handles, windowsills, and door handles, etc.

If all the fingerprints at a crime scene were extracted, it would be an endless workload for most criminal science teams.

But when it comes to Jiang Yuan, categorizing thirty-some fingerprints leaves only half. In fact, many duplicate fingerprints had long been excluded from these thirty-some.

When it comes to the feature point marking stage, complete fingerprints are as difficult as elementary school arithmetic problems for Jiang Yuan. A glance over, and the speed is as fast as his hands can move.

Jiang Yuan only spent half an hour on the fingerprint extraction work for the entire fan surface, averaging two minutes per fingerprint. And even then, Jiang Yuan usually doesn't need to do this.

Instead, the fingerprint matching stage carries a bit of luck and metaphysics.

However, there were no tricks to the fingerprints this time...

Although the owner of the fingerprints was indeed quite "flowery."

Just as Jiang Yuan expected, one of the three young ladies had indeed been hit before, and had been hit three times, making the average number of hits for the three young ladies one.

This is the so-called "broken windows theory." Once a person has been caught once and hit once, they are likely... not so afraid of the hit itself—this is also one of the secondary disasters caused after drunk driving became a criminal offense.

And from Jiang Yuan's way of thinking, the three young ladies were all being filmed by the photographer together. Even if the business model was a bit different, they were still close and knew each other.

Thinking this way, Jiang Yuan picked up his phone again and called the office of the Cold Case Task Force.

"Team Leader Jiang?" Tang Jia was sitting in the center at this time.

"En, I'll send you another person, a prostitute. See where she mainly works, and find the local public security police to understand the situation. En, make a call and have her report to the Ningtai County Bureau. In addition, I'll give you three more people, two of whom are suspected to be prostitutes, and one is a pimp. You find the technical investigation and network security departments to study it, and mark the time and place where the three of them appeared together."

While speaking, Jiang Yuan sent Tang Jia the information of several people.

Because Jiang Yuan's technical indicators comprehensively exceeded the standard, he has always been straightforward in handling cases.

This time, Jiang Yuan was still playing it straight. In his opinion, if this photographer Wang Haoyu was a drug dealer and a part-time pimp, and also ran that photo studio that didn't make much money, then even if he were a time management master, the time he could spend on the pimping work would be limited.

Since time is limited, the number of young ladies Wang Haoyu could control must be small.

And if he wanted to use his job to entertain his superiors, gathering the young ladies under his command together to give the guests more choices, it should be very likely.

The two people guarding the living room looked at each other silently. They stayed in the police station, and if they wanted to use technical investigation and network security on a daily basis, they had to report in advance.

In a while, Tang Jia's call came back: "There are more than ten locations confirmed now, should I send them to your phone?"

"More than ten locations? How many provinces and cities?" Jiang Yuan was a bit surprised. This photographer has a very close relationship with the three young ladies. Looking at it this way, always calling him a pimp is a bit insulting. He is somewhat involved in organizing prostitution, which is a difference of 2 to 7 years in prison.

"Three provinces, five cities," Tang Jia said.

"En..." Jiang Yuan pondered slightly and said: "Like this, you report to Political Commissar Huang, and then go to the Anti-Drug Detachment. Ask them for the frequency of the new type of drugs during this period, especially the loose goods of the drug type I sent you, and let them compare it with the time these people appeared."

Jiang Yuan intentionally did not mention words like "Pop Rocks."

The two people in the living room naturally listened even more confusedly, only knowing that Jiang Yuan seemed to be preparing to mobilize the Anti-Drug Detachment again.

At this time, the two were a bit restless. After all, they really didn't bring guns!

Tang Jia quickly made a record on the other end of the phone and asked: "Should I send the results to you after the comparison?"

"I want cases with clues. If there are corresponding cases at the corresponding time and place, you send me the case numbers."

"Understood."

Tang Jia understood at this time that Jiang Yuan was connecting a series of cases in this way, which was equivalent to merging a series of drug cases through three prostitutes and a pimp.

This method is an extremely efficient mode for solving cases, but the difficulty is also quite high.

Of course, if the whole case can be completed in this way, it is also a mode with a very high degree of completion, because the number of solved cases will increase, the amount of money and drugs involved will increase, and the facts of the case will be more comprehensive. The most direct impact is that the death penalty rate for the people involved will greatly increase!

Jiang Yuan put down his phone, smiled at the two police officers, took the opportunity to pour them a cup of tea, and said bluntly: "It might be a serial case. Thank you for protecting me this time. I'll make sure you get credited for it later."

Police officer Liu Ling said subconsciously: "No need, no need..."

"What nonsense are you talking about." The police officer next to him interrupted him quickly, and then said to Jiang Yuan: "Thank you, Team Leader Jiang. We will definitely stand our post well, and we will be here as long as the position is here!"