1995, Starting as a Criminal Investigation Expert

On December 6, 1972, the 126th Research Institute was established on the basis of the former Third Bureau of the Ministry of Public Security, namely the Technical Division of the Public Security Bureau.

In 84, it was renamed the Second Research Institute of the Ministry of Public Security.

The ministry also has a First Research Institute, established in 60, which is responsible for research on police equipment and technical services.

The second research institute focuses on physical evidence identification, criminal technology research, and support for solving major cases.

The journal "Criminal Technology" was sponsored by the Second Research Institute.

It is not just a magazine; for one thing, it is "one team, two names" with the Second Research Institute.

He is the editor-in-chief of "Criminal Technology" and also the director of the Second Research Institute.

The journal's editors were all researchers from the institute, and also legitimate police officers.

Furthermore, the Second Research Institute is a bureau-level unit directly under the Ministry, so Wang Ze'an's rank and professional title are much higher than his own.

"Hello, Editor Wang."

Li Shu quickly greeted them and then asked what their purpose was.

Wang Zean said, "I read the three papers you sent, and I liked them very much. In particular, I asked Academician Shi about the partition comparison method for the automatic fingerprint comparison system."

He interjected, saying that Academician Shi, who developed the AFIS system, was an academic advisor for criminal technology.

"I just found out that it was because of your partitioning comparison method that they upgraded their system. So Li Shu, your three papers are quite valuable."

He gave a compliment.

Li Shu dared not say he was flattered, but he was definitely happy.

The fact that the other party called personally is enough to prove their high regard for the paper.

Wang Ze'an continued, "We won't be able to make it for the October issue, but the year-end issue is definitely on track. And you don't know, Editor-in-Chief Liu personally made the decision, saying that your article should be placed at the very beginning of the layout."

Criminal Technology is a bimonthly journal, published six times a year.

Placing it at the beginning of the layout shows that it is important.

Li Shu quickly expressed his gratitude.

Secondly, the Chief Editor Liu mentioned by Wang Ze'an should be the director of the Second Research Institute.

Doesn't that mean even the director of the institute saw his paper?

The person's level should be even higher than Tang Weidong's.

Long-distance calls are quite expensive. Wang Ze'an called for two reasons: first, to get to know each other and catch up briefly; second, to leave a mailing address.

This way, if Li Shu has any new articles in the future, he can send them directly to me without having to go through Zhang Lu to forward them.

Since this was brought up, Li Shu took the opportunity to say a few more words.

"Editor Wang, I happen to have a few papers to write."

Li Shugang was about to explain the contents in detail and wanted Wang Ze'an to give his opinion. If it was worth publishing, then he would continue writing.

If you're not qualified, don't waste your time.

Before he could even finish speaking, Wang Ze'an preemptively asked what kind of content it was.

He read the article and spoke highly of Li Shu.

Moreover, this wasn't just his opinion; the editor-in-chief also gave the same assessment.

The article on the quick location method, in particular, was the one the editor-in-chief valued most and decided to put on the front page of the next issue.

Furthermore, there are plans to promote this nationwide through internal documents.

Therefore, Wang Ze'an would definitely be interested in Li Shu's new idea.

Li Shudao said, "There are quite a few. One of them is for capturing and extracting fingerprints from curved surfaces, which can achieve the same effect as taking photos of flat surfaces without being inaccurate."

"Regarding proportions, there's another issue: in the event of an unexpected lack of a scale, I also have a method for comparison."

Because phone calls are expensive, Li Shu quickened his pace and mentioned using EOS dye to extract fingerprints from dark-colored, textured carriers.

At this point in the conversation, Wang Ze'an hurriedly interrupted Li Shu on the other end of the phone.

"Speak slowly, I don't understand. How did you make a curved fingerprint that achieves the effect of a flat photograph?"

"And this dark substrate, is it the dark color I understand, or the textured surface? Can this kind of fingerprint be extracted?"

Wang Ze'an's tone was full of questions.

In his mind, this seemed impossible.

"Sure." Li Shu simply pulled up a chair and sat down, then quickly explained the principle, starting with the surface unfolding method.

"Holy shit!"

On the other end of the phone, Wang Ze'an exclaimed in surprise, his mind filled with only one thought: Is this even possible?

"Li Shu, wait a minute, let me find some paper to write this down."

He hurriedly found paper and pen and asked why it needed to be cut to a width of one millimeter.

"That's right! If you just overlap the negatives, there will be a height difference, which will cause inaccurate focus during shooting. So you have to cut them. Brilliant!"

Wang Ze'an took a deep breath and exclaimed that he understood.

The same sentiment was expressed by Li Shu when he mentioned shooting with side lighting.

"That's right, that's right. If you shoot from the front, the left and right sides will indeed recede and become out of focus. Good method, how did you come up with it?"

Wang Ze'an clicked his tongue in amazement.

He happened to be working on fingerprint research at the institute.

Therefore, he reviews all fingerprint-related submissions; he's an expert in this area.

Just this year, in the fifth issue, he and others were about to release a research project that involved the most advanced DFO fingerprint display technology from abroad.

So don't be fooled by their youth; if they truly understand something, they'll definitely become experts when they get down to the next level.

But after hearing Li Shu's description, I still felt enlightened, as if my mind had been opened up and I had gained new insights.

"Brilliant!"

After exclaiming "Wonderful!" twice, Wang Ze'an hurriedly said, "Li Shu, your idea is excellent. Extracting curved fingerprints has always been a major problem. With your method, fingerprints can be extracted perfectly."

Fingerprint extraction from various club-like weapons has always been problematic due to inaccurate proportions.

Unexpectedly, Li Shu actually solved the problem and even completed the application.

"What about the dark carrier? What dye did you just mention?" Wang Ze'an asked anxiously.

He then asked Li Shu to speak more slowly and to provide a more detailed explanation.

I didn't even care about the phone bill anymore.

Since the other party wanted to hear it, Li Shu couldn't hide anything from them. So he started with the case and introduced the preparation of the EOS dye and the key to extracting fingerprints.

On the other end of the phone, Wang Ze'an could be heard occasionally letting out soft gasps.

Faintly, one can still hear the sound of pens flying across the paper as characters are written.

"Okay, okay, is there anything else? What did you just mention about the scale? What's going on?"

Wang Ze'an pressed for an answer.

This situation is rather special, but it is still possible. Li Shu personally felt that it was worth publishing, so he explained it in detail.

"Is there anything else?"

Wang Ze'an's breathing became more rapid.

Three more top-tier papers! They are highly innovative and practical, and criminal technology is exactly what we need most – these kinds of papers.

"some."

Li Shu glanced at the clock on the wall; they'd been talking for almost half an hour.

Phone calls are expensive.

The key is that the other party won't hang up, so Li Shu can't just hang up first.

"We had a case where the body had already undergone adipocere, but I used a method to extract the fingerprints from the body and confirm the source of the body."

Magnetic powder is also a very good method.

"Adipocere?"

Wang Ze'an couldn't help but exclaim in surprise on the other end of the phone.

Extracting fingerprints from a corpse requires very strict conditions.

The body was completely adipocere, the surface was covered in wax and mushy, so how could fingerprints be extracted?

After Li Shu finished speaking, Wang Ze'an felt as if his mind had been shocked, with a buzzing sensation.

It's gotten smarter!

He never imagined that freezing could be used to achieve the silencing of magnetic powder.

"This is quite similar to vacuum coating technology," Wang Ze'an remarked.

He immediately named the vacuum coating technology.

Li Shuyi thought it made sense.

This technology was originally introduced by the ministry in the 1980s, and then the ministry led the manufacturers to produce the coating machine.

It's highly likely that it was introduced by the Second Research Institute.

Li Shudao said, "That's right, the principle is very similar. I also have two practical cases regarding this vacuum coating technology, which I'd like to write about in a paper."

Wang Ze'an was surprised and said, "No, you know about vacuum coating? There are only a few of these machines produced. How did you get in touch with them? I don't remember Nanjiang having them."

Li explained the situation.

"Holy crap, the Jianfeng Hotel case is solved?" Wang Ze'an exclaimed in surprise.

Back then, their police station provided technical support for this case and sent fingerprint experts.

"That's right, it's broken," Li Shu said.

This case spans three provinces and is quite complex. It has not yet been closed, so the Second Research Institute may not be aware of it.

I explained the situation to them.

The main point is to illustrate that vacuum coating technology has an excellent effect on old, sweaty fingerprints, far surpassing 502 smudging.

"Oh My God."

Wang Ze'an exclaimed again.

Firstly, it was unexpected that Li Shu helped 803 solve this old case.

Based on his understanding, Li Shu was from Nanjiang, a technical police officer in an ordinary prefecture-level city.

This actually helped solve the 803 case, and it actually worked.

Not to mention, Li Shu also discovered a new application method for vacuum coating technology.

"Li Shu, you don't have any other ideas, do you?"

These are already several ideas; if there are more, that would be terrifying.