1995, Starting as a Criminal Investigation Expert

Actually, sending your fingerprint directly to them is faster for comparison.

But if you make the trip in person, at least they'll take it seriously.

Besides, it's so close, it's no trouble at all.

A group of several people rushed to the Yanling Municipal Public Security Bureau.

Upon arrival, we went upstairs and headed straight to the technical team.

I met their captain, Wu Qi, when I last came to Yanling.

When he arrived at the office, Wu Qi was talking to a middle-aged man wearing a jacket.

Upon seeing Li Shu and his group, the middle-aged man spoke first, asking in surprise, "Xu Qiang, what brings you here?"

"Old Li."

Xu Qiang quickly greeted him.

This person is Li Huanxiang, the captain of the Yanling Criminal Police Detachment.

Han Jianjun quickly handed over a floppy disk and beckoned Wu Qi to compare it.

Li Huanxiang asked curiously, "Old Xu, what case is it? The one involving Guan Lin? You've extracted fingerprints? Wait a minute, didn't Xiao Rui say the body was already highly decomposed?"

Xiao Rui had mentioned this case when he came to Yanling to investigate missing persons, so Li Huanxiang knew some of the details.

How do you extract fingerprints from a highly decomposed corpse?

Xu Qiang laughed and said, "That's right, but you don't know, we have an expert in our department. He managed to extract fingerprints from a wax-corroded corpse. We couldn't find a match over there, so we came here to try."

Wu Qi, who was about to leave, suddenly stopped and asked in surprise, "A corpse that's been turned into adipocere? Really?"

Li Huanxiang said he hadn't thought much about the highly decomposed corpse.

Who knows how corrupt it has become?

If the corruption is not severe, it is normal to extract fingerprints.

But adipocere?

Wu Qi hurriedly asked Han Jianjun what was going on. The body was completely adipocere, and the skin was covered in oil and wax, which couldn't be washed off. How could fingerprints be extracted?

"You'll have to ask Li Shu about that; that's the solution he came up with." At this point, Han Jianjun couldn't help but show a proud expression.

I'm proud of my own people.

Wu Qi then looked at Li Shu, who had come to see Liu Zhenping with another person last time.

Afterwards, Liu Zhenping held a special meeting for their technical team to seriously share and discuss Li Shu's fingerprint comparison method.

At the time, he wondered how Li Shu could come up with so many fingerprint comparison methods.

Now it's even more amazing; fingerprints can be extracted from highly decomposed, adipocere corpses.

Li Shu was now more concerned about whether the fingerprints could be matched, and said, "Captain Wu, let's go and compare them first, and I'll explain it to you slowly."

Wu Qi nodded and led the group straight to the computer room.

While waiting for the fingerprint to be compared after entering it into the system, Li Shu also quickly explained the extraction method.

Wu Qi was stunned and asked in surprise, "Li Shu, why did you think of freezing corpses?"

It's simply unbelievable.

Everyone knows the structure of the papillary lines and furrows, but no one expected that fingerprints could be extracted by freezing and thawing, and then using a permeating solution to flush magnetic powder.

This is like a mathematical research where someone suddenly comes up with the correct formula with a wide-eyed stare—it's amazing.

After thinking for a moment, Wu Qi quickly nudged one of his subordinates and told him to go find Director Liu.

This is such a good idea, we should let Liu Zhenping hear it.

In Yanling City Bureau, Liu Zhenping is the true number one in technology.

The results are in.

The Yanling system was developed by Liu Zhenping in collaboration with Tsinghua University, and it is different from the system used by Peking University.

In particular, it lacks the function of optimizing itself.

So after the first round of results came out, Li Shurang ran several more rounds.

The algorithm is rather rigid, relying solely on feature points.

This sometimes leads to different results, requiring multiple comparisons and manual verification.

Li Shu operated another computer to examine the fingerprint with the highest probability in the first round.

Zhao Ziqin.

He is 31 years old this year and is a native of Wujing, Yanling.

Wujing was originally a county, but like Tingyang, it was just upgraded to a city in the first half of this year.

Guanlin borders Huangli Town in Wujing.

Then the probability of this person increasing has increased.

Despite his short tenure, Li Shu has spent the past month researching fingerprints, and not just simple research, but in-depth research on highly complex fingerprints.

The system is constantly gaining experience.

Therefore, Li Shu can now truly be called a fingerprint comparison expert, as he has developed a strong intuition about fingerprints.

Upon accessing Zhao Ziqin's fingerprint file, Li Shu immediately felt a sense of familiarity.

I feel like it's her.

Zoom in and compare carefully.

Han Jianjun and Wu Qi also came over to take a look. Xu Qiang was chatting casually with Li Huanxiang at the door, his attention was entirely on this side.

"Old Han, it seems to be this one," Wu Qi said.

Han Jianjun reached for the paper and counted the items using the old method.

Li Shu had already mentally counted all the key features, and said with an excited and firm tone, "No need to look anymore, it's her, Zhao Ziqin!"

In his excitement, Li Shu clenched his fist and punched it hard.

It actually matched up.

"It matched?" Xu Qiang suddenly leaned in.

Han Jianjun stopped taking out the paper.

Li Shu is a master; since Li Shu said so, then it must be him.

Li Shu nodded and immediately pulled up the archived information, which explained why Zhao Ziqin had left this fingerprint collection card.

"Do you do this?" Xu Qiang immediately frowned.

The records show that Zhao Ziqin was a prostitute.

On July 18, 1992, Tan, a sales manager from a factory in another city, met Zhao Ziqin in Wujing.

The two parties agreed on the price for the prostitution, but afterwards, Tan felt that Zhao Ziqin had not worked hard enough during the transaction, so he was only willing to pay half of the price.

Zhao Ziqin had a big argument with the other party and was beaten by them.

Still furious, he immediately gathered his friends Li and Zhao and returned to the hotel to take revenge.

After being beaten, Tan admitted defeat, paid the remaining prostitution fee, and gave Zhao Ziqin all the two hundred yuan he had left.

As a result, the noise was so loud that other hotel guests called the police.

When the police arrived at the scene, Tan vehemently denied soliciting prostitution, and the two eventually reached a settlement after a fight broke out.

The people in the detention center were aware of Zhao Ziqin's prostitution activities, and therefore knew the reasons behind it.

But Tan denied it, so the matter was dropped.

As a result of this incident, Zhao Ziqin left her fingerprints.

"Anyway, it's good that the match was found!"

Xu Qiang couldn't hide his excitement. Someone like Zhao Ziqin must have complicated social relationships, but at least they knew who died, which was more important than anything else.

"Li Shu, you did a great job, you've done it again." Xu Qiang praised him profusely.

Out of caution, Li Shu wanted to compare the fingerprints of the other fingers again. Liu Zhenping walked in and asked what merit he had made.

Everyone quickly greeted them.

"Please sit down."

Liu Zhenping waved his hand and then asked what was going on. Wu Qi insisted that he come and take a look.

After understanding the situation, Liu Zhenping remained silent for a moment.

Now he understood why Wu Qi had called him here.

Looking at Li Shu again, Liu Zhenping clicked his tongue and said, "Li Shu, Li Shu, you've really surprised me once again."

It's unbelievable that Li Shu managed to extract fingerprints from the adipocere.

He quickly asked Li Shu to explain the principle in more detail.

It wasn't explained clearly enough.

"Director Liu, you two talk first, I need to make a phone call." Xu Qiang grabbed Li Huanxiang and hurriedly ran outside.

Zhao Ziqin died in Nanjiang, and the case was filed in Nanjiang, so the investigation will definitely focus on Nanjiang. However, Zhao Ziqin was from Yanling, so Li Huanxiang can definitely provide some assistance.

For example, we should first confirm whether Zhao Ziqin has actually gone missing.

Li Shu finally breathed a sigh of relief and carefully explained his method to Liu Zhenping.

Liu Zhenping listened in stunned silence, and finally exclaimed, "I used to think that my ability to apply topological theory to fingerprint matching was already a great innovation, but compared to your idea, it's nothing at all."

My research is simply an experiment with existing methods.

Li Shu's approach is quite remarkable; he essentially created a completely new method for a particular, unsolvable situation.

This is what true innovation looks like.