1995, Starting as a Criminal Investigation Expert

The train station is not far from the municipal bureau.

As soon as the motorcycle turned into the city bureau compound, before it even stopped, Li Shu caught a glimpse of a person walking quickly towards the building entrance.

Lin Wanping.

"My ancestors, you've finally returned."

Lin Wanping grabbed Li Shu's arm and wouldn't let go. He first asked with concern if Li Shu was tired and if he wanted to go back to the dormitory to rest and adjust to the time difference.

He was so careless that he even mentioned jet lag.

"Captain Lin, I'm not tired. Let's work on the case first."

The fact that Han Jianjun and his team could call Ying Tan shows just how urgent things were at the Municipal Bureau.

Tan Guoxiong also mentioned this on the way here.

He went to the scene with them to find out what was going on.

The crime occurred late at night in a remote location. The suspect had cleaned up the scene, there were no witnesses, and almost no useful clues were found.

Xu Qiang's side is now bigger than a watermelon, and he's eagerly hoping that Li Shu can make a discovery and achieve a breakthrough.

Don't leave your things behind, head straight to the brigade office.

Before even entering the door, one could hear Tang Weidong's angry roar.

[At this point, I hope readers will remember our domain name: 20 ...

Lin Wanping's expression changed, and he hurriedly grabbed Li Shu.

At this point, he stopped going in to get beaten.

"Stop pointing fingers at Li Shu. If solving cases all depend on him, what am I supposed to do with you?"

Tang Weidong's tone was not only aggressive, but his words were also unpleasant.

Everyone inside was probably shivering; no one dared to breathe too loudly.

Li Shu listened silently.

From my own experience, Tang Weidong seems like such a kind and amiable person.

He winked at Lin Wanping, suggesting that he should go back to the team first.

Lin Wanping quickly grabbed Li Shu, meaning he couldn't leave.

At this moment, Tang Weidong strode out.

Xu Qiang followed behind her pitifully, just like a timid little wife.

"Ugh!"

Turning around, he saw Li Shu.

Tang Weidong's previously gloomy face instantly brightened, and he greeted him with a smile: "Good lad, if you hadn't come back, I would have thought that Matsuura had detained you."

Then he asked if the journey was smooth.

At this moment, he has become a gentle and kind patriarch.

Xu Qiang sighed silently, filled with envy.

Upon hearing from Li Shu that Duan Chengyan had personally come to see Tang Weidong off when he transferred trains in Songpu and had asked Li Shu to give him his regards, Tang Weidong's smile became even brighter.

That's Duan Chengyan, the legendary detective.

After inquiring about Duan Chengyan's health, Tang Weidong said, "Li Shu, logically speaking, you've been busy on business for so long, you should be given a couple of days off to rest. But unfortunately, the case is pressing, so I urgently called you back."

As he spoke, he turned and glared at Xu Qiang.

Lin Wanping hurriedly looked down at his feet.

Xu Qiang maintained his smile and silently endured it.

"What are you laughing at? You still have the nerve to laugh!" Tang Weidong scolded.

Xu Qiang also looked down at his feet.

Now even laughing is considered a mistake.

Turning his head again, Tang Weidong's expression shifted dramatically, and he asked with a smile, "I heard from Lao Han that you have a way to extract fingerprints from doorknobs. How about it, are you confident you can succeed?"

There was a hint of tension in his eyes; he was still preoccupied with the case.

Li Shu nodded and said, "It should be possible."

In the past, we might have needed to be more cautious and humble.

Now that I'm practically an expert myself, if I say it's okay, then there's no problem.

"good!"

Tang Weidong's eyebrows practically flew off as he turned his head and said, "Listen to Xu Qiang, listen to how confident he is. And look at you, when asked how long it will take you to solve a case, you can't even utter a coherent word."

Xu Qiang nodded repeatedly and continued to examine the feet.

After giving him a lecture, he said to Li Shu, "Li Shu, you've worked hard anyway. Think of a solution. If you have any requests, just tell Lao Han, and I'll handle it."

Now, let's talk about the requirements.

Li Shu's heart stirred, and he brought up the matter of the vacuum coating machine.

"Director Tang, this is a very good technology for solving difficult fingerprint problems. Fortunately, there is a manufacturer in Matsuura that can make it. I wonder if we could get one for our team? I think it would be really useful."

Xu Qiang quickly looked up and glanced at Li Shu.

I was thinking, "I told you to make a request, and you actually did."

Tang Weidong nodded repeatedly and asked, "Since you think it's useful, then we can import it. By the way, is this thing expensive? How much does one unit cost?"

Li Shu quickly replied, "It's not expensive, maybe only ten or twenty thousand."

This is not one of those complex, multi-target, automated coating, computer-controlled, and expensive systems.

To put it simply, it's a sealed box with a vacuum pump; the structure is very simple.

"I agree to buy it. Just submit a report later and I'll sign it," Tang Weidong said without hesitation.

As long as it's not a star in the sky, Li Shu can get whatever he wants by his best efforts.

Xu Qiang looked up, his eyes filled with shock.

The inner liner of a thermos in my unit broke, so I bought a new one myself. When I tried to get reimbursed, they refused, saying that whoever broke it had to pay for it.

So, they agreed to something worth ten or twenty thousand without even blinking?

After seeing Tang Weidong off.

Xu Qiang sighed softly, composed himself, and greeted them with a smile.

"Li Shu, are you tired? Do you want to go back and rest? Oh right, you haven't eaten yet, have you? Hurry up, Lao Lin, go to Lao Qian's place outside and cook a couple of dishes for Li Shu."

Lin Wanping quickly ran away.

Li Shu followed Xu Qiang into the office.

Goodness, they all turned to look at us, their eyes burning with desire.

"Li Shu, I heard from Lao Han that you have a solution, is it really possible?" Xiao Rui stepped forward and asked eagerly.

Li Shu glanced at the blackboard.

There are photos of the scene above.

Li Shu took a closer look and saw that it was a red Xiali.

Li Shu saw the deceased Liu Yanjuan in a photograph.

When they found her, she was in the car, leaning motionless against the seat with her head tilted to the right, as if she had fallen asleep.

Tan Guoxiong was still overestimating her abilities; in terms of appearance, Liu Yanjuan was more or less average.

"Xu Zhi".

After looking through the photos, Li Shu said, "If there really are latent fingerprints on the inside of that doorknob, then I have a way, and hope, to extract them."

Before Xu Qiang and the others could rejoice, Li Shu quickly changed his tone and said, "However, you should know that extracting fingerprints is only the first step; the key is whether they can be matched."

What if the other party has no criminal record?

Even if fingerprints are extracted, the case cannot be solved in a short period of time.

"I understand."

Xu Qiang sighed and stared at the blackboard, saying, "I know how difficult this kind of case is."

In Xu Qiang's experience, in cases like this taxi robbery, the suspects usually fall into one of two categories.

The first type is for beginners with little to no experience.

Because robbing a taxi is quite risky.

The driver was conscious of his surroundings and avoided going to remote areas late at night.

Moreover, they are usually male drivers, so they are not so easy to subdue.

Then the income is uncertain, and it is very likely that you will encounter a situation where someone does not get much work in a day.

Also, you need to spend a long time in the same car with the driver. Even if you pretend, you still have to talk. At that time, you will face the problem of how to deal with the driver.

If he doesn't kill the person to silence them, what should he do if he tells the police about his situation?

Another scenario involves transient migrants who rob and then run away.

In either case, it's possible that fingerprints were extracted but then couldn't be matched.

After saying that, Xu Qiang sighed again and said, "Let's not think about the later parts for now. Should we solve the first step first?"

Li Shu nodded.

That's right, let's extract the fingerprints first.

Immediately, he and Tan Guoxiong rushed back to the team.

Upon entering the office, another round of small talk was inevitable.

Han Jianjun grumbled, "Look at you, you rushed back so fast that you didn't even get to eat the victory celebration dinner in Songpu."

Cao Junfei stopped Han Jianjun from nagging and turned to ask Li Shu what specific methods he planned to use to extract fingerprints.

Without wasting words, Li Shu took a piece of paper, quickly wrote down a name, and asked who would go and buy it.

"I'll go."

Peng Rong spoke first, taking the document and glancing at it.

Alcohol-soluble eosin Y.

"What is this?" Peng Rong asked.

Everyone looked at Li Shu.

Li Shudao said, "It's an industrial biological tissue staining agent, scientifically known as tetrabromofluorescein. Don't worry, it's easy to buy. By the way, you must buy the alcohol-soluble one, absolutely not the water-soluble one, or you'll be in trouble. Oh, and also get a bottle of glacial acetic acid, for mixing solvents."

Peng Rong nodded blankly, then asked why he wanted to buy this thing and what it was for.

He had never heard of this thing before, nor had he ever heard that it could be used for fingerprint extraction.

Zhao Yong also asked a question.

He had never heard of this Yihong Y.

"It's hard to explain in a short time, Rong-ge, you go and buy it first."

Then he instructed Peng Rong to make sure to buy alcohol-soluble ones, because if he bought water-soluble ones, the fingerprints would just dissipate immediately upon use.

Peng Rong nodded and hurriedly set off.

But I couldn't help thinking that the solution Li Shu had proposed before was at least somewhat plausible.

That's great, they just picked something out of thin air and said it could solve the problem.

It's really just a brute-force solution.