1995, Starting as a Criminal Investigation Expert

In front of a deputy director, Peng Rong couldn't help but be cautious, so he carefully interjected, asking if topological theory could also be used for fingerprint matching.

Li Shu had actually studied Liu Zhenping's theory through the system, but he was more curious about how Liu Zhenping came up with this method.

Liu Zhenping was very approachable and smiled, "Of course."

Then, he asked Peng Rongtuo what he meant.

He still needs to teach.

Peng Rong quickly replied.

Topology has many definitions, but its core idea is to study relationships, not shapes.

"That's right, it's about relationships."

Liu Zhenping nodded in agreement, raised his finger and said, "You can look at fingerprints like this; it's like an oil painting on elastic fabric."

"Because of pressure, it can deform and distort, interfering with our judgment. However, amidst this change, some things remain constant, namely the positional relationships of the characteristic points."

"Feature point A will only be next to feature point B, and it is also contained within it. C is in the middle of feature points D and E, etc. This is called encirclement. There is also the order. FGH is on a stripe line."

"I believe this positional relationship is unique and can be used as a basis for determining whether fingerprints match."

At this point, Liu Zhenping looked at Li Shu.

The jigsaw puzzle method that Li Shu is currently using extracts feature points from different incomplete fingerprints and then pieces them together; in essence, it is about finding positional relationships.

He was about to offer some praise, noting that Li Shu's method coincided with his own, when Peng Rong blurted out, "Isn't this just Li Shu's rapid positioning method? Something like that?"

According to Peng Rong, the rapid positioning method is essentially about finding fixed positional relationships.

"What method?"

Liu Zhenping was taken aback.

Han Jianjun pointed at Li Shu and said, "It was Li Shu who came up with the idea."

He then explained the principle of the rapid positioning method, saying that it can significantly improve efficiency when using manual methods.

At this, Liu Zhenping's expression changed.

Originally, he admired Li Shu for being able to tackle such a tough challenge.

Young people, there aren't many who have this kind of courage.

After listening to Li Shu's story, Liu Zhenping was amazed.

It was discovered that Li Shu not only had courage, but also methods.

Now, it's shocking.

He understood the intricacies of positional relationships best, so as soon as Han Jianjun finished speaking, he immediately grasped the essence of the matter.

In an instant, there was even an outburst of emotion.

When all that can be done is manual comparison, someone can creatively come up with this method to multiply efficiency. This is a testament to the spirit of human determination to overcome nature.

It is also a great wisdom.

Looking at Li Shu again, Liu Zhenping's eyes were filled with admiration; he saw his own reflection in Li Shu.

He joined the army at the age of 17, was discharged in 73 and became a policeman. In just 12 years, he rose to the position of deputy director, which was simply a miracle.

It wasn't about connections, but about constantly thinking about things at work and always looking for better ways to solve cases.

Li Shugang just joined the company and he can do this; it's exactly like me.

"You're something else, kid. If you were from Yanling, I'd definitely train you properly."

Liu Zhenping developed a love for talent.

He was promoted to deputy director, but he still had to stay on the front lines. To put it bluntly, there was no one to succeed him, and no capable people to take charge of things below.

If the bureau had someone as talented as Li Shu, things would be much easier for me.

Li Shu dared not accept this, and could only thank Liu Zhenping for the praise, then cautiously asked if his judgment was correct.

this is the key of the problem.

Liu Zhenping pondered for a moment, then nodded and said, "I think it's fine. Because it's not just about the characteristic points of the thumb fingerprint, but also the thumb and index finger, which is also a kind of relationship."

"Moreover, the probability of forming this correct positional relationship increases exponentially, which is much more difficult than simply matching 8 feature points. So I think your judgment is correct; it is this person."

At this point, he probably guessed why Li Shu and the other two had come to him, and said, "If you need an expert report, I can sign it for you."

Han Jianjun was overjoyed: "Director Liu, that's wonderful!"

As long as Liu Zhenping can sign his name, the court will recognize the appraisal report.

"Li Shu".

Liu Zhenping liked it more and more as he looked at it, and said, "You just said that when you were comparing them, your intuition told you that this was the person. But then you came to ask me, which means you hesitated and doubted that you were wrong."

"You can't do that. Your skill level is above theirs. They can't help you; you can only rely on yourself. And sometimes, you really have to trust your gut feeling."

He pointed to Han Jianjun and the other man.

Han Jianjun didn't care at all.

There is a sequence to learning, and Li Shu is a new employee and still young, but his fingerprint comparison skills are superior to mine, which is nothing to be ashamed of.

Since the appraisal report hadn't been written yet, I decided to stay in Yanling for a day.

The next day, after getting Liu Zhenping's autograph, he hurriedly returned to Nanjiang.

We drove straight to the Municipal Bureau from the national highway, and when we arrived, we dropped Han Jianjun off first.

"You two go and deliver the report first; they're probably really worried over there," Han Jianjun instructed.

The case was from four years ago, and no suspects were identified back then. Four years later, it will only be more difficult to find evidence to pinpoint Cao Fangxu.

But things are different now; this expert report is irrefutable proof.

After watching the two drive away, Han Jianjun went upstairs with a smile.

To receive recognition and praise from a top expert like Liu Zhenping, Li Shu's level of expertise must at least be considered that of a provincial-level expert.

As soon as I entered, before I could even say a word, a young man rushed up to me.

"Team Leader Han".

The visitor gave an awkward smile and eagerly asked what the result was.

"Who are you……"

Han Jianjun didn't recognize the person, but after asking, he learned that they were from the Tingyang Criminal Investigation Brigade.

Those are Tian Yu's people.

"What are you doing here?" Han Jinjun asked curiously.

Cao Junfei, who was standing next to him, said, "I arrived yesterday and have been waiting for you for two days. It seems that the investigation over there is not going very well."

The young man thought to himself that things were not just going well.

"We haven't taken any action against him yet. We want to investigate when he committed the crime, but it's been four years. Many people have long forgotten about it and can't explain it clearly, so we can't investigate further. The team is in an uproar, discussing whether to bring him back for interrogation."

As he spoke, he quickly asked about the test results.

Knowing that Li Shu and the other two had gone to Ningshan, Tian Yu arranged for him to wait at the Municipal Bureau so that he could find out the results as soon as possible.

"The match is confirmed, it's him."

Han Jianjun didn't keep anyone in suspense.

"Really? That's great!" The young man almost jumped for joy, excitedly asking where the report was.

Upon hearing that Li Shu had already gone to deliver it, he hurriedly ran outside.

"That kid."

Han Jianjun shook his head slightly, thinking to himself, "Why don't you just make a phone call?"

Cao Junfei and Zhao Yong came forward and asked if the comparison was correct.

Han Jianjun nodded and explained the situation.

"This teacher is even worse than the student; he had to make another trip to Yanling to finally resolve this matter."

Han Jianjun finds it funny whenever he thinks about it.

Then, remembering Liu Zhenping's attitude, he grabbed Cao Junfei and dragged him into the office.

Such a talented person deserves our utmost care.

Meanwhile, Li and Shu drove and soon arrived at the Tingyang branch of the Public Security Bureau.

As I walked upstairs to the outside of the brigade office, I could hear a huge commotion inside.

Someone was shouting that if they handed the kid over to them, they would definitely be able to pry his mouth open in less than two hours.

Tian Yu retorted, "I've said this many times already. You absolutely cannot bring people in without sufficient evidence."

It's easy to bring people along.

But what if it's not Cao Fangxu?

It wasn't that Tian Yu was afraid of wronging Cao Fangxu; Tian Yu was mainly worried about what Qiao Suqing would think.

She was paralyzed, and the only ray of sunshine in her life was Cao Fangxu, but it turned out that Cao Fangxu was the one who harmed her.

Even if it's a misunderstanding, it will still make you feel awkward.

I can't break them up!

Just as she finished speaking, she looked up and saw Li Shu entering the room.

Tian Yu stood up abruptly, casting an inquiring glance at him.

Everyone else turned to look at them.

Li Shu hesitated for a moment, then nodded.

Even if I don't want to, it's still him.

"Hold!"

Tian Yu angrily turned around and kicked over the chair.