1995, Starting as a Criminal Investigation Expert

Tingyang was originally a county, but it was abolished and upgraded to a county-level city in June of this year.

Therefore, Tingyang is called the Municipal Bureau.

However, it was still based on the original county public security bureau, with only one technical squadron, average staffing, and rudimentary equipment.

This year, we've been upgraded to a county-level city, so we need to expand our team.

Han Jianjun came for this very reason.

The meeting was over, but a phone call from Zhao Yong captivated Han Jianjun.

What is the "feature point rapid localization method"?

Zhao Yong didn't explain clearly over the phone, only saying that he wanted to make a locator that could improve the comparison efficiency by two to three times.

Nanjiang will leave its mark on the history of criminal science and technology development in China.

For example, as early as 1952, the Nanjiang Municipal Bureau took the lead in opening a photography service, becoming the first in the country.

Of course, Han Jianjun hadn't joined the Municipal Public Security Bureau yet at that time.

But he grew up alongside the Nanjiang Technical Brigade and was a participant in it.

He wasn't formally trained in acting; there weren't many formally trained actors back then.

These are all traditional methods, figured out little by little by myself.

But Han Jianjun has worked for nearly thirty years and has an incredibly rich experience. The fingerprint database of the municipal bureau was created by him and his team.

Based on his experience, fingerprint comparison is a time-consuming and labor-intensive task that requires extensive work experience.

There may be some working methods that can improve comparison efficiency to some extent.

To increase it two or three times in one go is just too exaggerated.

And it was proposed by a recent graduate.

If Li Shu had this ability and this kind of innovation, he might have stayed at the university, or his position might have been intercepted by the provincial authorities.

Is it really the Nanjiang Municipal Public Security Bureau's turn to receive it?

Zhao Yong spoke with such conviction, practically praising Li Shu to the skies, that Han Jianjun was unsure and just wanted to hurry back and see what was really going on.

He said goodbye in a hurry, went downstairs, and got on his sidecar motorcycle.

My Yangtze 750 is brand new; I've only ridden it for nine years.

Actually, the technical team includes Tai Changhe.

But that one car is quite old, and it has a problem with idling; it always stalls.

So they usually only drive when they're on a scene; otherwise, they ride a sidecar tricycle.

There's no other way; funds are tight, and there aren't many cars to begin with. All the police departments in the city combined only have 57 cars, some more and some less.

They're all old cars, with high fuel consumption and expensive refueling, so we can't bear to drive them normally.

But everything is getting better.

Director Tang is getting a new car; his subordinates have been eyeing his old Santana for a long time.

Just as they were about to set off, Guo Xiangyang, the captain of the technical squadron of the Tingyang Municipal Bureau, chased after them.

He held a document in his hand and handed it over, saying, "Old Han, there's a theft case. The team's investigations haven't yielded any results, and the fingerprints haven't matched. Could you take this to the Municipal Public Security Bureau for comparison?"

Theft is especially prevalent these days.

In practice, the core of case handling is still to conduct visits and investigations.

Fingerprint comparison is not the primary method for solving crimes.

Because the criminal police also know that fingerprint comparison is time-consuming and laborious, and it is difficult to make a match, so they usually don't place all their hopes on fingerprint comparison.

"Hey, I'm already so busy, and you're adding to my burden?"

Han Jianjun complained.

Guo Xiangyang tossed the documents into the side compartment and said with an embarrassed smile, "Just helping me out."

Han Jianjun was about to say that he was really busy, but the burglary case in the High-tech Zone hadn't yielded any results from the investigations, and the whole team was focused on fingerprint comparison, so he really couldn't spare any more manpower.

But then he remembered Zhao Yong's suggestion, hesitated for a moment, said "This is the only time," and hurriedly left.

There weren't many cars on the road, and his tricycle sputtered and emitted black smoke as he returned to the municipal bureau more than half an hour later.

As I entered, I bumped into Xiao Rui, the captain of the first brigade, leading his men out.

They were in a hurry.

However, he still spotted Han Jianjun, raised his arm, and shouted, "Old Han, fingerprints, fingerprints!"

Han Jianjun waved his hand impatiently and hurried upstairs.

Upon entering, the room was as busy as ever, with everyone seemingly asleep, slumped over the table.

He quickly glanced at Li Shu in the corner.

They're working right now.

Then he went straight to Zhao Yong, patted him on the shoulder, and asked what the positioning method was.

He had noticed a frame on Zhao Yong's desk.

It was probably cut from cardboard with a transparent plastic sheet sandwiched in the middle, and then placed over the fingerprint card.

Upon seeing the newcomer, Zhao Yong hurriedly stood up, pulled Han Jianjun down to sit, and couldn't contain his excitement.

Everyone tried it, and their guesses were correct, which greatly improved the comparison efficiency.

He was about to introduce this so-called positioning method to Han Jianjun when he paused, shouted towards the corner, and wanted Li Shu, the inventor, to come and introduce it in person.

Li Shu called out to Team Leader Han, showing no stage fright, and pointed to the positioning frame, giving a detailed explanation of his method for rapid feature point positioning.

On the way back, Han Jianjun spent a lot of time thinking about this so-called positioning method.

Without a comprehensive understanding, one naturally cannot grasp the intricacies of the matter.

He was also skeptical, but after listening carefully to Li Shu's explanation, Han Jianjun, as the team's most experienced "expert" in fingerprint comparison, immediately realized the power of this method.

He took a quick, shallow breath, touched his chin, and pondered deeply.

Especially when Li Shu mentioned that the relationship between the positions of the feature points is relatively fixed, he felt a sense of sudden enlightenment.

I've been enlightened!

The confusion in my mind suddenly cleared up, and I found the answer.

Oh, I see.

Han Jianjun's eyes widened. Before Li Shu could finish his introduction, he hurriedly picked up the locator on the table and looked at the marked location against the window.

Once the location is determined, all you need to do is remember the characteristics of this point, then place it on the fingerprint card, roughly determine the center, move it slightly, and look for potential matching possibilities...

"Oh My God!"

Han Jianjun cried out, his eyes changing.

He pointed out incisively, "Wouldn't that greatly shorten the comparison time for similar fingerprints?"

Zhao Yong nodded hurriedly and gave Han Jianjun a thumbs up to praise his quick thinking, saying, "Old Han, that's exactly what you said, which is why I said it can at least increase our comparison efficiency by two to three times. I'm not exaggerating."

Han Jianjun bent down.

Examine the fingerprint card carefully through a horseshoe-shaped magnifying glass.

By slightly moving the locator, other areas of the fingerprint can be ignored, allowing for a simple and rapid search for known feature points.

Then, if the positional relationship is wrong, then it will definitely be wrong.

It would be strange if the efficiency wasn't fast.

Putting down the horseshoe-shaped mirror, Han Jianjun stared blankly at the locator, his mind still a little dazed.

The locator was crudely made and not complicated; it just had a few dots on it.

But no one had thought of doing this before, even though fingerprint comparison has been around for so many years.

He couldn't help but look up at Li Shu.

That was a youthful exuberance that was clearly visible to the naked eye.

Does this mean that younger people really do have better brains?

"Li Shu, did you come up with this yourself?" Han Jianjun asked.

Li Shu nodded: "Captain Han, I like to think things through when I'm at school, so I came up with this idea. And it's not just this one idea, I've thought of many other ideas as well."

The system offers many methods, so I need to lay the groundwork first.

Han Jianjun waved his hand, then looked at the locator and said, "Putting everything else aside, your method really works."

He bit his lip, muttering "two to three times," his eyes growing brighter with each thought.

The AFIS system hasn't been finalized by Director Tang yet, and it's unclear when it will be introduced.

In this situation, Li Shu's ability to devise such a method that greatly improves fingerprint comparison efficiency is truly invaluable.

"good!"

With a resounding "Good!", Han Jianjun pointed at Li Shu and praised, "You really gave me a pleasant surprise! A junior college degree? Not bad, really not bad. Your junior college degree might even be better than a bachelor's degree."

He said "good" several more times, his face growing happier with each word. He hurriedly picked up the locator and fingerprint card, thinking of going to talk to Xu Qiang about it.

As he ran out the door, he didn't forget to turn back and shout to Li Shu, "Li Shu, you're a good kid. I'll have to give you credit for this later."

Before they could finish speaking, the person had vanished without a trace.

Zhao Yong, with an expression that said, "I knew it would turn out like this," patted Li Shu smugly and said, "Get to work."

Li Shu is one of his own people, and he feels proud that Li Shu has this ability.