1995, Starting as a Criminal Investigation Expert

Xu Qiang paused slightly and immediately looked at Li Shu.

At the next table, several people from the Chongning branch also suddenly turned their heads and looked at Li Shu.

Clearly, they've been keeping it in mind.

He Chenghua said, "Li Shu, this case is from last year, so it's only been a year and a half. You were able to collect physical evidence from 14, so there shouldn't be any problem with evidence from a year and a half ago, right?"

His face was full of anticipation.

Li Shudao said, "Captain He, it's not a matter of how long it takes, but rather it depends on the specific circumstances."

Whether fingerprints can be extracted depends on the conditions.

Time is only one of the conditions.

"Brother Yong, you should know about this case. What's the reason?" Li Shu turned to ask Zhao Yong.

Zhao Yong couldn't possibly be unaware of last year's case.

He sits at one table.

He put down his chopsticks and said succinctly, "The suspect did clean up the scene, but the main problem is that the body was only discovered a month later, and our analysis shows that the porcelain bowl from which fingerprints were most likely to be extracted is white, so the 502 fuming agent didn't work."

Only professionals can get to the point.

If you leave a fingerprint on the ground for a month, the moisture will evaporate, and the method of applying powder, which relies on liquid adsorption, will no longer work.

Amino acids also degrade, but there is still hope; 502 fuming might be able to extract fingerprints.

But Zhao Yong said it was a white porcelain bowl.

The 502 inkjet printer displays light-colored fingerprints, which are difficult to distinguish with the naked eye on a white substrate, and therefore cannot be extracted.

"You can give it a try."

After thinking for a moment, Li Shu nodded.

This situation seems to be a combination of the Jianfeng Hotel incident and the taxi robbery and murder case in front of us.

One issue is the long time elapsed, which presents limitations; the other is that the carrier makes traditional methods unusable.

Vacuum coating can perfectly solve these two problems.

"real."

He Chenghua's eyes lit up.

Those few people from the Chongning branch also had their eyes shining.

Li Shu nodded and said, "But we'll have to wait a few days. We need a vacuum coating machine. I just submitted a report, but I haven't gone to buy it yet."

We can only proceed after we purchase the coating machine.

"It's alright."

He Chenghua quickly shook his head. He had already waited a year and a half, what was a few more days?

He beamed with delight, and seeing that Li Shu had almost finished his tofu pudding, he quickly said, "Well, Wang Xing Ji should be open by now. Are you full? How about we go for another meal?"

Xu Qiang held him down.

"You're thanking people by treating them to Wangxingji? Or at least Jufengyuan. Perfect timing, I haven't thanked Li Shu and the others for Zhang Yichao's case yet, we can do it together then."

He Chenghua nodded in agreement immediately.

As long as the case can be solved, Jufengyuan is willing to go all out.

Zhao Yongchong and Xu Qiang gave each other a thumbs up, their eyes remaining silent.

You can even freeload off someone who's being treated?

After dinner, Xu Qiang and his team returned to the Municipal Public Security Bureau.

Once the person is caught, they still need to be interrogated.

Even if the case is approved, there will still be a lot of reports to write and many things to handle.

Li Shu stayed up all night and went back to the dormitory with Tan Guoxiong to catch up on sleep.

Xu Qiang said so.

He said that he had solved a series of major murder cases these past few days and must be exhausted, and that he could rest for a few days if he wanted.

That's what they say, but Li Shu can't really just sit idly by.

Putting everything else aside, Zhou Pan has to produce his own fingerprint identification report.

After getting up in the afternoon, Li Shu asked Tan Guoxiong to go to the Municipal Bureau together.

Upon arrival, while delivering the report, Li Shu inquired about the progress of the case.

It has been approved.

Zhou Pan is only 20 years old this year. Although he dares to kill, it doesn't mean he can withstand interrogation.

"Captain Xiao, it seems we guessed right."

In the brigade office, Li Shu sat chatting with Xiao Rui.

The group's analysis was mostly correct.

Zhou Pan lived near Madun Bridge. His parents divorced when he was young, and he lived with his father.

But his father didn't care about him and had a bad temper, often beating him, which led to his eccentric personality.

This wasn't something Xiao Rui and his friends came up with randomly; it was something his father said himself.

They say this child has been like a silent gourd since he was little, and he doesn't know how to talk to people.

Zhou Pan later said that he started getting acne on his face when he entered junior high school, and his father didn't care, which made him feel increasingly inferior.

His grades were already bad, and now they've plummeted. He failed to get into high school and went to a vocational school to learn how to operate a lathe.

In a vocational school environment, it's even less likely to learn anything well.

He started hanging out with random people, frequenting video arcades, and came into contact with a lot of illegal products.

At this time, he was in puberty, a time when he was naturally starting to develop sexual desires, but he had a lot of acne. He had pursued girls before, but after being rejected once, he was too ashamed to pursue them again.

Anyway, it's getting more and more depressing.

Until recently.

After graduating from technical school at the age of 18, he stayed at home for a year before getting a job as an apprentice in a small factory through his father's introduction.

When I get off work, I pass by those hair salons.

Seeing all those beautiful women every day makes me incredibly itchy inside.

The key issue is that we don't have the money.

That's when the idea of ​​robbery came to mind.

He used to hang out with thugs and beg for money from elementary and middle schools.

In his words, he is experienced.

On the day of the incident, he prepared his tools and asked several cars for directions near Madun Bridge.

As a result, no one went.

Liu Yanjuan only agreed to go because he promised to pay her more money.

Upon arrival, the reason why the crime turned into murder was pretty much as everyone had guessed.

Just because I touched it once.

They grabbed Liu Yanjuan from behind and forced her to hand over money.

That spot was so convenient.

Zhou Pan, perhaps emboldened by his successful robbery and the feeling of controlling others, boldly reached out and touched someone.

When they interrogated him, he regretted it, saying it wasn't the feeling he had imagined.

As a result, Liu Yanjuan reacted extremely, thinking that Zhou Pan was going to assault her, and begged for mercy.

According to Zhou Pan's confession, at that moment, he really had the idea of ​​assaulting Liu Yanjuan, and he may have said a few words that implied, "Even if I assault you, what can you do about it?"

This led Liu Yanjuan to retaliate, and when he wasn't paying attention, she threw a water glass at him.

He was in excruciating pain from the blow. Seeing Liu Yanjuan trying to run away, and fearing she would escape, he panicked and became furious. Without thinking, he went all the way and by the time he realized what was happening, Liu Yanjuan was already lying in a pool of blood.

Lin Wanping got up again to pour water for Li Shu, and then said, "He only robbed two hundred and eighty yuan in total. We thought he would behave himself for a few days and lay low, but when we caught him, it was already his second all-nighter."

He sat down, chuckling, and said, "That young lady also said that he was impatient and wanted to hurry."

Xiao Rui coughed lightly: "Old Lin, why are you always so vulgar?"

Lin Wanping shrugged indifferently, then looked at Li Shu and said, "Li Shu, I've found that your so-called psychology is quite useful. Could you find me a couple of books? I'll study them later."

Zhou Pan's fingerprints are not in the database.

If Li Shu hadn't analyzed that this person was really holding back, he wouldn't have been able to use this method to find people.

Then this case is very likely to be treated as an old case.

"OK."

Li Shu nodded in agreement, left the appraisal report, and got up to leave.

Starting with the Zhang Yichao case, I essentially solved four murder cases in one go.

But it was far from over; a bunch of old cases were waiting for him at the bureau.

I went to work the next day.

Han Jianjun suddenly found him and led him to the room next to the computer room.

"This used to be where the corporate security company stored miscellaneous items. I took it over. You guys are going to work on old cases, right? I was thinking that with so many files, there needs to be a place to store them."

Han Jianjun explained the situation and continued, "Also, this room is quite big. If you tidy it up, you can have your own space for any small inventions you come up with later."

"How is it? Are you satisfied? If not, there are other rooms upstairs. I'll go find some more."

Tang Weidong had instructed that a comfortable working environment should be created for Li Shu.

That's why Han Jianjun had this idea.

Even setting aside old cases, if you have any whimsical ideas or want to come up with some small inventions, you need your own space.

"Anyway, feel free to bring up any ideas you have, I'll handle it." Han Jianjun spoke with absolute confidence.

Li Shu certainly wouldn't refuse.

Immediately, they called Tan Guoxiong and Peng Rong to come and clean up together.

It was all packed up in one morning.

After lunch, Li Shu continued working on old cases in the afternoon.

Having your own space is great; large offices with many people inevitably become cluttered.

Now, one person, without handling any complicated murder cases, has only handled three hundred non-homicide cases.

They didn't look at the case details, they just looked at the fingerprints.

First, a batch of fingerprints with good fingerprint characteristics were randomly selected and entered into the system.

Then I make a cup of tea, move the mouse, sit down, and before I know it, it's time to leave work.

"Wow, this is a match?"

Tan Guoxiong called Li Shu to leave work and saw a stack of case files on the table.

Each case file also contains a record, which clearly matches the suspect's information.

The key is quantity.

Tan Guoxiong quickly counted and found that there were as many as 14 copies.

"That means you solved 14 cases in just one afternoon!" Tan Guoxiong exclaimed in astonishment.

This speed is faster than chopping melons and vegetables.

Li Shu got up, stretched, and asked in return, "Is 14 a lot?"

"I feel like I'm having a bad day."

Only 14 cases were compared.