1995, Starting as a Criminal Investigation Expert

Xu Qiang returned.

The screening process has begun, and everyone is busy as bees.

It's said to be simple, but it's actually quite troublesome.

Every name on the account books found in Huang Youjun's house needs to be checked.

Moreover, it's not just about investigating this person; it's also about investigating whether his parents have passed away.

This requires going through household registration records and manually comparing them.

If the situation is unclear, you should call the local police station to inquire.

Therefore, the overall workload is still quite large.

But everyone was full of fighting spirit, with a strong determination to avenge their previous defeat and prove themselves.

"Chief Xu, Director Tang has praised us quite a bit, hasn't he?" Xiao Rui asked with a smile.

Xu Qiang snapped out of his daze and nodded.

Yes, I praised her.

Although he was praising Li Shu, wasn't Li Shu one of his own?

What's the difference between praising Li Shu and praising oneself?

"Old Xiao, stop with all this 'we' stuff. You're making it sound like we're from two different families. Don't forget, we're a team."

Xu Qiang gave him a lecture.

Then the technical team is no longer under my control?

Xiao Rui was taken aback.

No, we were just united against a common enemy a moment ago, how come we're family again?

Xu Qiang didn't explain, but told them to hurry up and screen the samples before turning to the technical team.

Han Jianjun also bypassed me and went directly to Tang Weidong, catching me off guard.

Upon finding Han Jianjun, Xu Qiang grumbled a couple of times.

Han Jianjun explained, "It's not my fault. I was so excited after reading it that I thought it was so well written that I went straight to Director Tang."

Xu Qiang nodded; that was indeed true.

No wonder Jay Chou praised it; even he himself thought it was good.

Han Jianjun asked, "Then why did you come all this way to find me? Do you have different ideas?"

Li Shu optimized the management of physical evidence, which involved not only the technical team but also the operational aspects.

During the investigation of the case, criminal police officers need to collect physical evidence.

Criminal police officers also handle on-site evidence collection and the transfer of physical evidence after the case is closed.

If the process is optimized now, they will also be affected.

"Hey, Lao Han, is that how you see me?" Xu Qiang snorted, then said, "Actually, it's better to be stricter."

It wasn't just lax management that led to him eating meat from a freezer that had contained corpses.

The management was not serious in the past.

Take the collection of physical evidence as an example. There are often cases where someone signs on behalf of another, or someone borrows physical evidence and forgets to return it, and then signs it again.

Nobody cared; they figured as long as it wasn't lost, it was fine.

Because of this, there have been quite a few accidents. Now that management is stricter, it's really not a bad thing.

"Old Han, you have no idea how much Director Tang praised Li Shu. If things continue like this, you'll have to step down and make way for someone more capable in a few years," Xu Qiang teased with a smile.

Han Jianjun snorted lightly: "I'll step down if I want to, I'm happy to."

I'm already this age, what's wrong with making room for younger people?

"Okay, you're very generous, I admire that."

Xu Qiang stood up and asked where Li Shu was.

I didn't see it when I came in.

Seeing that the technical team was so proactive in offering suggestions to optimize the evidence storage process, would Tang Weidong let Xu Qiang off the hook?

He gave instructions and asked Xu Qiang to think about how to make the case investigation more standardized in the future.

Xu Qiang gets a headache just thinking about optimizing these processes.

Thinking about Li Shu's masterpiece, I wanted to have a chat with him.

Just for your reference.

When Li Shu was found, he was in the technical team's laboratory, observing two warheads through a comparative microscope.

These two bullets were recovered from the Yang Luxiang family annihilation case.

It only has a bullet, no casing.

Even though the fingerprints didn't match, Li Shu didn't give up. He tried looking at other physical evidence to see if he could make any new discoveries to help find the suspect.

Bullets are an important piece of physical evidence.

In 84, the Ministry issued the "Provisional Regulations on the Management of Gun and Ammunition Trace Records".

The requirement is that all firearms, whether in the possession of various agencies or seized at crime scenes, must be archived, and three to five bullets must be fired to create a record of the bullet and casing traces.

Therefore, every police station also has a large number of gunshot wound records, just like fingerprint cards.

Li Shu then considered what would happen if the suspect committed another crime with this gun in another location after the incident last year.

If you get caught, that's for the best, because there will be fingerprint records.

But if he hadn't been caught, he might have left behind a bullet, which would be important evidence for a joint investigation to trace the gun's whereabouts.

Even if it's the former, when comparing fingerprints elsewhere, gun and ammunition records can be used as auxiliary comparison methods.

The system has a lot of data on bullet comparison, and Li Shu can study it to accumulate some experience.

And so, my experience is increasing little by little.

It's better than nothing, but it's still an increase, and I can feel myself improving and learning something.

"Director Xu, I'm familiar with technical appraisal, so I can write recommendations, but I'm not familiar with your area."

This wasn't Li Shu being modest; he genuinely didn't understand.

Xu Qiang laughed and scolded, "You little rascal, you're actually being modest with me."

He had been thinking of becoming a criminal investigator, and he didn't believe that Li Shu hadn't studied criminal investigation.

Upon seeing Xu Qiang, Li Shu asked them what to do next.

It's highly likely that the fingerprint won't match.

When this was mentioned, Xu Qiang couldn't help but feel a little proud.

That was such a great idea, but Tang Weidong couldn't share it with him, which really frustrated him.

He then pulled Li Shu aside and shared his thoughts.

Upon hearing this, Li Shu's eyes lit up, and he nodded repeatedly: "Chief Xu, you're right. The suspect's killing of Kang Guiying was indeed highly targeted, possibly because of his mother's death, and it's related to Huang Youjun."

This is a really good direction for screening.

"Right?"

Xu Qiang laughed, his eyes crinkling with laughter.

Unexpectedly, Li Shu hesitated for a moment, then said, "Chief Xu, but I don't think it's right to screen people from Huang Youjun's clients."

Xu Qiang's smile suddenly froze on his face, and he asked what he meant.

Li Shudao said, "Think about it, Kang Guiying was able to keep the suspect in, and she even went to the market to buy fish and meat, and cooked a whole table of dishes to properly entertain the suspect."

"Does this mean that Kang Guiying knows the suspect and is quite familiar with him?"

Why invite someone to dinner if you're not familiar with them?

"If it's just about owing money to Huang Youjun, how can I go to Kang Guiying and say that I owe her son money and I need to find him now? Kang Guiying would have no reason to invite him to dinner."

"Even if the suspect could fabricate a lie and say that he was Huang Youjun's friend, I feel that even so, if they weren't familiar with each other, Kang Guiying might say, 'Then go find Huang Youjun,' rather than warmly inviting him to stay for dinner."

Xu Qiang's eyes widened suddenly.

The word "damn" almost slipped out of my mouth.

Li Shu continued, "Chief Xu, I think this is most likely a case of someone known to the victim. If your direction is correct, you can start by investigating Huang Youjun's social connections and collect fingerprints on a large scale. Maybe that will help us find this person."

The analysis suggests the suspect has a criminal record, but what if he doesn't?

"Chief Xu?"

Seeing that Xu Qiang didn't respond and just stood there stunned, Li Shu called out.

Xu Qiang snapped back to reality.

In an instant, I felt my face burning hot.

He cursed Lin Wanping countless times in his heart.

What an idiot!

It's all his fault, always telling people to use their brains.

Okay, okay, you've led yourself astray, completely ignoring such a basic principle.

Fortunately, I hadn't been too embarrassed to tell Tang Weidong before.

If I were to say it, and then find out it's not like that, wouldn't that be a huge joke?

There's also Li Shu.

This brain is incredibly sharp; it has strong logical thinking and immediately spotted the inconsistencies.

It would be a real waste if he didn't become a criminal investigator.

Li Shu had no idea what Xu Qiang was thinking, but the more he thought about it, the better he felt Xu Qiang and his team's idea was.

It's somewhat similar to what I did when I contacted Zhou Pan before.

"Chief Xu, I remember that the case file showed a large-scale investigation into Huang Youjun's social connections. There were so many people involved. Why don't we start with these people and collect their fingerprints? Maybe we'll find something."

These people were just conducting a preliminary investigation; they didn't mention collecting fingerprints.

What if the murderer is among them?

Thinking of this, Li Shu couldn't sit still any longer and got up to ask Xu Qiang if they should set off now.

Since I'm free anyway, I might as well help collect fingerprints.

"No rush."

Xu Qiang quickly stopped Li Shu.

Wait until I get back and yell at someone before we talk.

Just as Li Shu was about to speak again, Peng Rong's voice came from outside the door, saying there was a phone call from An Jing.

Li Shu was puzzled. Could it be that the fingerprints matched in Anjing?

Also, it's the capital city after all, the attitude is so good, they even made a phone call to let us know when they found out.

He quickly ran outside to answer the phone.

After a quick "hello," a gentle male voice came through the phone: "Hello, hello, is this Li Shu? I'm Wang Ze'an, an editor in the Criminal Technology Editorial Department."