1995, Starting as a Criminal Investigation Expert

The middle-aged woman stopped the car, rushed forward, and grabbed Li Shu's handlebars.

She looked to be in her fifties, with a thick ponytail, quite a bit of gray hair, and wrinkles and age spots on her face. She asked urgently, "Are you police officers?"

Li Shu nodded, leaning on the bicycle.

Technical police are still police, no problem.

"Big sister, is there something you need?" Li Shu asked.

Grandpa Hong from the security room next door came out.

When Li Shu first came to report, he generously handed the other party a pack of cigarettes, so Grandpa Hong remembered Li Shu and said, "Li Shu, she's looking for the whole brigade, you don't need to worry about it."

The middle-aged woman, probably because she had been stopped by Grandpa Hong, glared at him resentfully, and then said urgently, "Officer, have you found the murderer in my son Zhang Ruiping's case? He's my only son. Can't you tell me what's wrong?"

"Zhang Ruiping?"

Li Shu's expression changed slightly.

Li Shu hadn't seen the complete case file of the case in the High-tech Zone, but he had seen the on-site investigation report.

This contains the identification reports of the deceased and the injured.

The deceased was named Zhang Ruiping.

Li Shu quickly got out of the car and asked her what she had come for.

The woman, Qian Feng, gripped Li Shu's sleeve tightly and said, "I'm heartbroken. My son is only 26, and I just want to know who killed him. But you keep telling me you haven't found the person yet, and that you can't tell me. Why? I'm his mother! Why can't you tell me?"

She kept rambling on, but Li Shu understood the core meaning: she was eager to know who had killed Zhang Ruiping.

This is a question that the entire team also wants to know.

The key issue is that the case is still under investigation, and according to regulations, details of the case cannot be disclosed to the public.

Li Shu attempted to explain the rule.

But Sister Qian wouldn't listen at all. She kept complaining, saying that she wasn't told whether the murderer had been found or not, and that she wasn't allowed to take the body back for burial. She said her son was lying in the morgue with no one to keep him company, and she felt sad whenever she thought about it.

The case is still under investigation, and the body certainly cannot be returned to the family.

Presumably, the brigade has already explained it to her, but Qian Feng is just upset and can't accept or understand it emotionally.

"Sister Qian, you should go back first. The bureau will definitely notify you when there is news."

In this situation, Li Shu could only try to persuade him gently.

Most importantly, I wasn't part of the team and didn't know much about the case investigation.

At this moment, Tan Guoxiong tugged at Li Shu and whispered, "Why don't we tell the First Brigade to come over and persuade them to go back first?"

Li Shu nodded and told Tan Guoxiong to go find Shen Chuan.

We lived in the dormitory in Shenchuan and often saw each other, so we were fairly familiar with each other.

Tan Guoxiong turned and left.

Qian Feng continued to ramble on and on, pleading and begging.

Grandpa Hong, who was standing nearby, also tried to persuade them, but it was no use.

It seems like she's stuck in a rut right now, feeling like she needs an answer before she can accept it psychologically.

Shen Chuan arrived shortly afterward.

Chong Lishu gave him a helpless look and asked Qian Feng why she was here again.

I was here this morning.

"Li Shu, you two go back to the dormitory first, I'll handle this." Shen Chuanchong and the other man waved their hands and led the people inside.

From afar, you could still see Qian Feng tightly gripping Shen Chuan's arm, constantly asking him questions.

Li Shu felt uneasy.

I felt like I had let Qian Feng down.

Back in his dorm, Li Shu adjusted his mindset a bit and then focused on studying the information on the system.

Tan Guoxiong lay on the bed, staring blankly at the ceiling.

Seeing Qian Feng, he felt even more deeply.

His father died tragically, and in his memory, he would stand with his mother outside the police station, waiting for the officers to leave work, and then asking them if the murderer had been found.

But there has been no result.

Later, my mother went there often, and each time she came back, she was distraught.

"Li Shu!"

Tan Guoxiong suddenly sat up and said, "The complete fingerprint didn't match, what about the half?"

In the case in the High-tech Zone, one and a half fingerprints were collected from the crime scene.

The fingerprint was incomplete and in very poor condition. Before the two men joined the company, Han Jianjun and his colleagues had studied it and concluded that it was not worth comparing.

But since the complete fingerprint couldn't be matched, Tan Guoxiong wondered if he could make use of this half fingerprint.

Li Shu quickly replied, "I've actually been thinking about that too."

During the day, Li Shu always felt like he was overlooking something, and later he realized it was that half of a fingerprint.

The system has many methods for fingerprint comparison.

Most of these comparisons focused on incomplete fingerprints or fingerprints obtained under unfavorable conditions.

So, can we use these methods to complete the comparison of this half fingerprint?

Just like the partition comparison method.

The problem is that these methods all rely heavily on the AFIS system.

The reason is that when you extract features from fingerprints by partitioning them, or reconstruct fingerprints based on experience and the direction of the ridges, you need to compare them with the database to know if your adjustment direction is correct.

Without an AFIS system, it means we have to do all the work we did before.

Moreover, it may not be just once, but many times, through repeated adjustments, speculations, and analyses, before a result can be found.

That would be a huge undertaking.

Only with the help of the AFIS system can screening be carried out quickly time and time again.

So after figuring this out, Li Shu didn't dare mention the idea to Zhao Yong.

I know it's unrealistic.

"Why is our bureau so poor?" Li Shu lay back down.

Logically speaking, Nanjiang is quite wealthy.

Seeing Tan Guoxiong deep in thought and silent, Li Shu guessed that he might be moved by the scene and said, "We can try to study that half fingerprint later. For now, let's finish comparing Tingyang's fingerprint first."

They are all cases, and we shouldn't favor one over the other.

Tan Guoxiong hummed in agreement and lay back down.

But I didn't hear any snoring.

The next day, the two of them went to work early as usual and began their day of comparison work.

Around 2 p.m. that day, after comparing hundreds of fingerprint cards all day, Li Shu picked up a fingerprint card at random, put the locator on it, and looked closely at it with the horseshoe-shaped mirror. Suddenly, his heart skipped a beat.

Over the course of nearly two days, Li Shu compared thousands of fingerprint cards and became extremely familiar with the target fingerprint.

It's like it's imprinted in my mind.

Now, with this quick scan, I have a strong intuition that the fingerprint card in my hand resembles...

Slowly move the locator, attempting to locate it.

In just a few seconds, the point of the poke coincided with the fingerprint card.

"Holy crap!"

In that instant, Li Shu felt his scalp tingle.

I immediately removed the locator, moved closer, and carefully examined the fingerprint card.

That's right, that's it!

Li Shu suddenly stood up, knocking the chair over with a loud crash.

"I matched!"

Li Shu shouted excitedly.

Tan Guoxiong looked up blankly at the opposite side.

A few steps away, everyone inside the house turned to look.

Peng Rong was also stunned and didn't react.

It was Zhao Yong again who hurriedly dropped what he was doing and rushed over, eagerly asking if the comparison had been successful.

Li Shu nodded hurriedly and showed the fingerprint card to Zhao Yong.

Zhao Yong quickly picked up the horseshoe-shaped mirror and observed carefully.

Peng Rong then realized what was happening and quickly came over.

Zhao Yong examined the fingerprint card, then the target's fingerprint, then the fingerprint card again, before putting it down and nodding, "That's right, this is it."

The target fingerprint is very clear, so it is relatively easy to distinguish.

Peng Rong couldn't wait to snatch the fingerprint card and compare it with the target's fingerprint.

Zhao Yong laughed and said, "Li Shu, not bad, you're lucky, you actually matched up."

A colleague next door even gave Li Shu a thumbs up.

But that's all.

After all, the fingerprints in Tingyang's case were quite good, and there were three more.

The so-called comparison is, frankly speaking, a clumsy method that doesn't really utilize human initiative.

If the match is found, then it's normal.

Because as long as the target fingerprint is in the fingerprint database, it will be matched sooner or later, and it has little to do with how hard you work.

Li Shu understood this, but he still couldn't contain his excitement.

The case in the High-tech Zone got off to a bad start.

Now that I can compare the evidence with my own hands, it really feels like I've helped solve a case.

Perhaps sensing that Li Shu wasn't in high spirits, Zhao Yong stirred things up, calling out to those inside while also giving Li Shu a few compliments.

Newcomers need encouragement.

"Now that the match is confirmed, let's get the report out as soon as possible. I'll have Peng Rong take you there in a bit to deliver it to Tingyang. They're waiting for the results too."

Zhao Yong gave a word of advice, then turned to attend to his own business.

Peng Rong patted Li Shu on the shoulder and handed over the task of producing the appraisal report to Li Shu.

"This is your first medical report, it's quite a memorable one."

Li Shu nodded vigorously.

That's right, this is the first evaluation report in my professional career.

So when Li Shu finished writing according to the format, signed his name, and stamped the seal of the Municipal Bureau of Technology, he couldn't help but feel a sense of accomplishment.

It was through his work that he identified the suspect.

Li Shu couldn't help but think that when Tingyang caught the suspect, during the interrogation, they would throw his forensic report directly in the suspect's face and tell him that the evidence was conclusive and it was him.

This feeling is just like personally catching a suspect.

Around 4 PM, I took the report, got on Peng Rong's sidecar motorcycle, and sputtered off towards the Tingyang Municipal Bureau.

On the way, passing through the High-tech Zone, Li Shu suddenly had an idea and asked Peng Rong if he could take him to the crime scene.

Even after Tingyang's case was resolved, Li Shu still had his mind on the case in the High-tech Zone.