1995, Starting as a Criminal Investigation Expert

Chapter 55 Successful Fingerprint Extraction

Since we've made the decision, let's do it.

Li Shu strictly followed the method in the materials and froze the severed right hand for up to 40 hours.

Time is of the essence.

The information states that after removing the body and applying powder, and after multiple experiments, the optimal time to take photos is around 10 minutes.

At this point in time, the magnetic powder has basically been deposited in the furrows.

Li Shu considered it and speculated that if the time was too long, the seepage liquid would spread, cover the entire finger, and completely wash away the deposited magnetic powder, making it a paste.

Dissecting a body is easy, freezing it is easy too.

It can be done in minutes, and then there's a long wait.

It was frozen around 2 PM and won't be ready until the morning after tomorrow.

While waiting, Han Jianjun and Qin Wenbao had a heated discussion.

The final conclusion is that it is theoretically feasible, but whether it will actually work depends on actual implementation.

Everyone was surprised by Li Shu's suggestion of this method.

In Peng Rong's words, Li Shu was too amazing; he could come up with all sorts of strange and wonderful ways to solve problems all the time.

Tan Guoxiong interjected, saying that this is the power of thinking.

He looked at Li Shu with admiration in his eyes; he had already witnessed the power of thought last time.

However, even when it comes to thinking, people are still different.

The power of one's own thinking may be far less than that of Li Shu.

"The power of thought."

Han Jianjun pondered it and found it very profound. He discussed with Cao Junfei about having Li Shu write a report, or rather, his thoughts.

"After we print it out, we can have the technical squadrons in the branch offices study it and understand its spirit. This will be beneficial."

Han Jianjun came from an era that placed great importance on spiritual strength.

Cao Junfei nodded in agreement and went on to say that it wasn't just about the technical aspects, but also about the business side.

Shouldn't we also need the power of thought?

He was considering having the publicity department interview Li Shu and publish a report to promote the story internally.

If we could cultivate a culture of thinking and researching more, that would be perfect.

The conversation got more and more outrageous, so Li Shu quickly became modest and said it wasn't that exaggerated.

Especially given my own situation.

People say that you stand on the shoulders of giants, but I'm standing on the shoulders of those who came before me.

The key is that if I were to be the first to propose these methods, wouldn't that leave future generations with no way to follow?

Xu Qiang only found out about this on the second day after his right hand was frozen.

Li Shu was having lunch in the cafeteria at noon.

In a flash, Xu Qiang, Xiao Rui, and Lin Wanping surrounded Li Shu as if they were arresting a criminal.

Li Shu was startled.

Lin Wanping had already hooked his arm around Li Shu's shoulder and asked Li Shu with a smile if he could manage.

Li Shucai realized what he was talking about, but he couldn't rule out anything, so he said, "Anyway, there's hope."

Xiao Rui's eye bags were now gleaming as he laughed, "As long as there's hope, that's all that matters. You really don't know, we've checked in Yanling too, but there's no match. I'm so worried."

Yanling requested assistance in the investigation, but nothing was found.

So at this point, we can only speculate that the suspect is an outsider. His family may not have noticed, or they may have already reported the case to the police, but it was reported locally.

The incident occurred on the 26th, and today is the 29th, four days later, and we still don't know who the victim is. The investigation is a complete mess.

Xu Qiang was also very happy.

Li Shu hesitated for a moment, but still wanted to pour cold water on the three of them, or rather, to lay out the unpleasant truth upfront.

That means even if fingerprints are extracted, there has to be a person in the fingerprint database for a match to be made.

If the match doesn't match, you still won't know who this person is.

"It's alright, you're a lucky guy, I'm sure you can beat him," Lin Wanping said.

Xu Qiang on the other side kept nodding.

Having worked as a criminal investigator for so many years, he truly believes that some people are just born lucky.

The next day, Li Shu got up early and rushed to the bureau.

It's almost six o'clock.

The team members, including Xu Qiang and the others, arrived early and gathered around the dissection room.

Qin Wenbao personally cleaned his right hand, which was frozen stiff.

Substances such as fatty acids adhering to the surface can be cleaned by freezing.

After washing, wipe it dry with a cotton ball.

Everything was already prepared, and Li Shu personally applied the magnetic powder.

On the first swipe, the system suddenly delivered a critical hit, and the experience points jumped from 2,300 to 2,800 in one go.

It directly added 500 experience points.

Clearly, this is a completely new fingerprint comparison method, so it requires a lot of experience right from the start.

Li Shu was already used to it, and his hands didn't tremble at all as he carefully brushed all his fingers.

Next comes the waiting and taking photos.

It was sent into the prepared darkroom.

Since a finger is a curved surface, we could actually use the previous curved surface unfolding system to take the picture, but that would be too troublesome and there wouldn't be enough time.

The method described in the materials is to simply press a glass plate on top and take a picture vertically from the front.

Then the light source needs to be properly positioned to prevent glare from the glass.

I thought about this yesterday and everything is ready.

With the scale set up, Wei Dejun, a veteran photographer, took the photos himself.

After filming, it was quickly sent for washing.

In the darkroom, Wei Dejun carefully examined the negatives, overjoyed: "It really took a picture!"

Li Shu quickly took it and, looking at it under the light, indeed saw the fingerprints.

The ring finger, in particular, was in the best condition and is now the clearest.

"How is it?"

Xu Qiang banged on the door, anxiously asking if it had been successful.

Han Jianjun took the film, examined it carefully, and smiled. He patted Li Shu on the shoulder hard and said, "Good lad, you've amazed me again."

He then shouted outside, "Stop filming, it's a success!"

The next moment, excited cheers erupted outside the door.

Another day passed, and there was still no progress in confirming the source of the corpses. They were hoping for a breakthrough on this front.

Now that we have the fingerprints, things will be much easier.

Although it is said to be a raised effect, now there is the AFIS system, which can preprocess the fingerprint and invert it into an intaglio that can be compared.

Li Shu still operates the AFIS system.

Let's compare it using the ring finger, which has the best condition.

The fingerprints were clear and the features were distinct, so Li Shu felt there was no major problem.

Everyone huddled around the computer, waiting anxiously.

The results popped up on the screen very quickly.

Li Shu quickly moved closer to compare the fingerprint with the one that had the highest probability of being the match.

Upon seeing the file card, I promptly gave up.

He is a male.

The next fingerprint belonged to a woman, but her age didn't match, and upon closer inspection, Li Shu found that none of the fingerprints matched.

Actually, the result could have been confirmed at this point, but Li Shu, unwilling to accept defeat, continued to look down, then readjusted the fingerprints, delineating a clearer area for comparison.

The result was still the same; it was still wrong.

With Li Shuneng repeating this action, everyone already understood the outcome.

"Oh shit!"

Lin Wanping angrily punched the wall.

After finally managing to extract the fingerprints, they couldn't be matched.

The atmosphere was somewhat somber.

Xu Qiang quickly said, "It's alright, it's already very good that we were able to extract the fingerprints. Also, since ours doesn't match, what about Yanling?"

Li Shu's eyes lit up.

Yes, and there's also Yanling.

Guanlin and Yanling are right next to each other, so the deceased may have come from Yanling, or the suspect may have deliberately dumped the body across the border.

Fortunately, Yanling also has an AFIS system.

"Walk."

Han Jianjun pulled Li Shu and told him to take the fingerprints so they could leave now.

He finally found a match, but this is the result he can't accept.

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