Riverside police

At two o'clock in the afternoon, Han Yu arrived at the criminal police detachment on time.

Wei Zhi was waiting in the office after lunch. When he saw him, he said apologetically: "Salted fish, drink some water first. The policemen of the detachment are all listening to the lecture in the technical brigade. When the lecture is over, let the comrades rest for ten minutes. I’ll send you over to talk again.”

"What's the lecture today?"

"Isn't 'Han Strike' back? Director Chen asked him to give a detailed lecture on criminal techniques to the detachment police, that is, on-site investigation, forensic anatomy, and extraction of fingerprints and footprints."

Han Yu asked in confusion: "Han Bingbing is back... Wei Zhi, is he an instructor at the OUHK, or a graduate student at the OUHK?"

Wei Zhi made tea, sat down and explained with a smile: "The instructor is part-time and mainly teaches economic investigation. It is said that he wrote all the economic investigation textbooks in public security colleges. His real identity is a policeman from our municipal bureau. Although He is a graduate student at the OUHK, but our city bureau pays him a salary every month.”

"Then after he graduates from graduate school, will he return to Binjiang to work?"

"This is equivalent to a targeted training. After graduation, he will definitely come back. Director Chen not only wants him to come back, but even wants him to help recruit a few graduates from the Public University of Hong Kong and the Criminal Court to work in our city bureau."

"Are you willing to work in Binjiang?"

"If the city bureau recruits people, I guess no one will be willing to do it. It's different if Han Bangshang helps with the recruitment. He is half a teacher at the OUHK. The teacher does the ideological work of the students and mobilizes the students to come to Binjiang. The effect is the same as if the bureau recruits people." It’s completely different.”

One year, I went back to my hometown in Sigang with my senior sister, and happened to meet Lao Lu, who took me to visit Liangzhuang Police Station.

At that time, the "Han Strike" team led a team out of the province to arrest people. They only saw the photos on the wall, but no other people.

Han Yu was very curious about the "Han Strike" that Lao Lu always talked about in the past, but now even Director Chen valued, and asked with a smile: "Wei Zhi, can I go and listen for a while?"

"What's wrong with this? I'll go with you."

"Thank you Weizhi."

…

The technical brigade does not work in the municipal bureau, but in a yard behind the municipal bureau, across the road from the municipal bureau.

Han Yu followed Wei Zhi out of the back door of the municipal bureau, crossed the road and came to the technical brigade with the brand of Binjiang Public Security Bureau Criminal Technology Research Institute.

The criminal technology lecture was held in the canteen of the technical brigade.

A young but steady, handsome and bookish policeman sat on the stage and talked, and the audience was full of people.

It can be seen that those who attended the lecture were not only technical police officers and investigators from the Criminal Police Detachment, but also police officers from the Criminal Police Brigade of Chonggang Branch, Hong Kong District Branch and Development Zone Branch.

Han Yu didn't want to disturb others' lectures, so he walked into the cafeteria from the back and sat in the last row.

"Comrade who just came in, please close the door."

"Oh, I'm sorry."

Han Yu didn't expect to be called upon as soon as he sat down, so he quickly got up and walked over to close the door.

The top student on the stage smiled and continued: "In order to let everyone understand more intuitively what DNA is, I have prepared a set of slides and asked the comrades near the window to close the curtains."

…

What he saw and heard next was eye-opening for Han Yu.

It turns out that DNA testing technology is not only found in movies and TV series. This technology has been widely used in police agencies in Western developed countries.

The Physical Evidence Inspection Center of the Ministry of Public Security, the Criminal Investigation Corps of the Donghai Municipal Public Security Bureau, the Criminal Investigation Detachment of the Shenzheng Municipal Public Security Bureau and other units all have DNA testing instruments and technical personnel, and they began to apply criminal technical identification four or five years ago.

The seemingly gentle "Korean Strike" not only understands, but can also detect.

"At a criminal crime scene, the evidence that is least likely to be damaged or even destroyed should be biological evidence. A small piece of the murderer's skin and flesh tissue between the victim's fingernails may not be visible to the naked eye, but as long as the operation is carried out in time By following the procedures for extraction and proper preservation, it is best to send it to a qualified appraisal institution for examination in a timely manner, so that you can grasp the most direct and strongest evidence of the murderer's crime!"

Han Chong paused and continued: "This is one of the reasons why I repeatedly emphasized that even if we do not have the technical conditions now, as long as the crime scene is a serious, careful and comprehensive investigation. It is as big as a puddle. Blood stains, as small as a hair, or even a small piece of dandruff, must be extracted as long as they can be extracted.

Although we currently do not have a DNA database for ex-convicts like a fingerprint database for ex-convicts, I believe it will be built one day. Some of the clueless cases we encounter in our work may be difficult to solve based on existing technical conditions, which does not mean that they will not be solved in the future.

You may be deeply aware that our public security organs are undergoing formalization and have increasingly higher requirements for case handling procedures and evidence. Where does the evidence come from? The evidence depends on our daily collection! So I would like to emphasize that as long as there are conditions for investigation, whether it is a major crime scene or a minor crime scene, our criminal technical police will go to investigate..."

I have to admit that "Korean Strike" is indeed of a high standard.

From criminal technology to laws and regulations and case handling procedures, and from laws and regulations back to criminal technology, it not only explains the profound things in a simple way, but also combines theory with practice. So much so that Han Yu felt that he could become a criminal police officer after listening to it for less than half an hour.

While I was listening intently, a policeman on duty shouted a report at the door.

"Please come in."

"Report to Teacher Han, the 110 command center said that someone died in a private house in Chonggang District. Let us get out of the scene quickly."

"Wei Zhi, even if I talk until dark, it's better to take the comrades out to the scene. Can you hold an on-site investigation meeting?"

Everyone is gone. Who will Xianyu come on stage to talk to later?

But police information is an order. Wei Zhi hesitated for a moment and agreed: "Okay, let's show up at the scene together. Comrade Han Bo, when we get to the scene, please guide the technical team in the investigation."

"yes!"

…

Plans never change.

I wanted to listen for a while, but it turned out that the police from the technical brigade were going to investigate the scene.

I was originally going to go on stage to give my own account and talk about the development of the Binjiang Marine Police and the 1998 flood fight, but in the end the audience had to follow along to observe the criminal scene investigation.

Han Yu didn't want to cause trouble to others, so he smiled and said without waiting for Wei Zhi to explain: "Wei Zhi, I happen to have something to do. I'll go to the Shuishang Branch first."

"How about the deed report be postponed to next Friday?"

"No problem, as long as I'm in Binjiang, I'll be there whenever you call."

"Okay, it's settled."

Dead people, and at the juncture of the upcoming New Year.

Wei Zhi didn't dare to take it seriously. When the police car from the detachment drove into the yard, he took the walkie-talkie from a criminal policeman, walked up to it, opened the door and drove away.

Han Yu was not in a hurry to go back, but went straight to the security office of the city bureau and used the phone number in Division Lu's office to contact Zhao Hongxing, deputy director of the Shuishui Branch.

"Bureau Zhao, I'm Han Yu, where are you? Have you figured out Liu Jie's whereabouts?"

"I'm in Wujiang, watching Liu Jie."

"Found him!"

"We found him the day before yesterday afternoon. Sure enough, he and Wang Xiaoyan were living together here. We watched them for two days, but we didn't have a clue. We were having a headache whether to catch him or not."

Han Yu raised his head and glanced at Director Lu, then smiled and said, "You can catch him, there's no need to keep an eye on him."

"What should I do if he refuses to admit it when I catch him?" Zhao Hongxing asked, sitting in a van with a local license plate, staring at a row of private houses diagonally opposite.

"I just listened to half of the lecture and benefited a lot."

"What does arresting or not have to do with listening to the lecture?"

"Of course it does matter. What I listened to was a criminal technology lecture. It was very professional. Teachers at the police academy would not give it to students easily. You can only hear it during on-the-job criminal police training."

Zhao Hongxing was so confused that he couldn't even laugh or cry. He held his cell phone tightly and said, "Don't be too pretentious. Are you sure that the person named Liu will speak?"

The half of the lecture just now was really not in vain.

Han Yu is now learning and selling it, and proudly asked: "Bureau Zhao, do you know about DNA?"

"I've heard of it. It was featured in Hong Kong and Taiwan police dramas."

"This technology is available in Hong Kong, and our domestic public security agencies also have it. As long as the suspect leaves biological evidence when committing the crime, as long as the extraction and analysis match the suspect's DNA, it can be used as evidence to bring the suspect to justice!"

"But we don't have the biological evidence you mentioned!"

"Biological evidence is not only the blood stains, skin tissue and hair left by the suspect, but also the sweat produced by the suspect when committing the crime, and even the grease left by the things the suspect touched while committing the crime."

"grease?"

"Every human hand will sweat, and the sweat contains the suspect's grease. Anyway, you can extract it with careful inspection!"

"Then what?"

"Then go for a DNA test." Han Yu smiled and said confidently: "Those ships that have been burglarized may be far apart. Even if we can find it, it will be difficult to extract the biological evidence of the suspect no matter how long the time passes, but these We know the situation, but the suspect doesn’t!”

Zhao Hongxing understood as if he was enlightened: "Xianyu, you mean to catch the bastard named Liu first, and then scare him to let him know that we have his biological evidence, and we will send him to do DNA work, as long as the DNA can be compared. , can he be taken to court?"

"It's almost the same, but we have to do the whole thing, act like it, and make people named Liu believe that we have the skills."

"Understood, I'll call and report to Bureau Wang right now."

"The Chinese New Year is coming soon, so hurry up."

"I know."

"Then you can ask the criminal police detachment to send two technical police officers to assist."

"Don't worry, I know how to play this scene!"

…

Every time Liu committed a crime, he had to climb onto the ship along the anchor chain.

Committing crimes on the water is different from committing crimes on the shore. It is inconvenient to wear a "water support" or gloves similar to a diving suit when committing crimes on the water. In other words, Liu must hold on to the anchor chain tightly before he can climb onto the boat. The tighter he holds on The easier it is to leave biological evidence.

According to the theory of "Korean Strike", as long as biological evidence can be extracted and compared, it can be used as evidence to confirm that all the ship thefts were caused by him!

It doesn't matter whether it can be extracted or even compared.

After all, the information was asymmetric. How did he know that the Binjiang Marine Police and even the Binjiang Public Security Bureau did not have the technical conditions at this stage? Even if they did, it would be difficult to find so many stolen ships for investigation.

In short, the next step is to rely on bluffing.

As long as the person named Liu can be frightened and waits for the person named Liu to speak, he can "obtain evidence" according to the old method, without the need for simple, rough or even illegal torture to extract a confession.

The more Han Yu thought about it, the more excited he became. On the way to the Shuangshui Branch, he secretly decided to go back and ask Wei Zhi. If "Han Crackdown" held another lecture, he must attend it and organize the police from the Shuangshui Anti-Smuggling Division to attend.

As long as it is conducive to work, there is no shame in learning from others!