Riverside Police.

Chapter 880
At two o'clock in the afternoon, Han Yu arrived at the criminal police detachment on time.

Wei Zhi waited in the office after lunch, and when he saw him, he apologized and said: "Salted fish, drink your saliva first, the detachment police are listening to lectures in the technical brigade, and after the lecture is over there, let the comrades rest for 10 minutes. I'll send you there to talk."

"What lecture is there today?"

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

Han Yu asked puzzledly: "Han Zhuang is back...Wei Zhi, is he an instructor at OUHK or a graduate student at OUHK?"

After making tea, Wei Zhi sat down and explained with a smile: "The instructor is part-time, and mainly teaches economic investigation. It is said that he compiled the economic investigation textbooks of the public security college. His real identity is a policeman of our city bureau, although He is a graduate student at the OUHK, but our city bureau pays him a salary every month."

"Then he graduated from graduate school and returned to Binjiang to work?"

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

"Would you like to come to Binjiang to work?"

"If the Municipal Bureau recruits, no one will be willing. It's different if Han Zhuang helps recruit. He is also a half-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 that of the bureau. It's completely different."

One year, when I went back to Sigang's hometown with my senior sister, I happened to meet Lao Lu, and was dragged by Lao Lu to visit the Liangzhuang Police Station.

"Han Clan" led a team out of the province to arrest people. They only saw the photos on the wall, but no one else.

Han Yu was very curious about the "Han Crackdown" that Lao Lu used to talk about, but now even Bureau Chen valued it, and asked with a smile, "Wei Zhi, can I go and listen for a while?"

"What's wrong with that, I'll go with you."

"Thank you Wei Zhi."

……

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, and across the road to the technical brigade with the sign of the Criminal Technology Research Institute of Binjiang Public Security Bureau.

Criminal technology lectures are held in the canteen of the technical brigade.

A young but prudent policeman who looked handsome and bookish sat on the stage and talked freely, and the audience was full of people.

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

Han Yu didn't want to affect other people's 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, 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 bully on the stage smiled, and continued: "In order to let everyone understand more intuitively what DNA is, I have prepared a set of slides, please close the curtains for comrades near the windows."

……

What he saw and heard next opened Han Yu's eyes.

It turns out that DNA testing technology does not only exist in film and television dramas, this technology has been widely used in police agencies in western developed countries.

The Physical Evidence Examination Center of the Ministry of Public Security, the Criminal Investigation Team of Donghai City Public Security Bureau, and the Criminal Investigation Detachment of Shenzheng City Public Security Bureau all have DNA testing equipment and technical personnel, and have used criminal technology appraisal as early as four or five years ago.

The seemingly polite "Han Zhan" not only understands, but also knows how to detect.

"At a criminal scene, the evidence that is least likely to be destroyed or even destroyed should be biological evidence. A small piece of the murderer's flesh tissue under the victim's fingernails may not be visible to the naked eye, but as long as you press the operation in time Extract according to the procedures, keep it properly, and send it to a qualified appraisal institution for inspection in time, and you will be able to grasp the most direct and strongest evidence of the murderer's crime!"

Han Zhan paused, and then said: "This is one of the reasons why I repeatedly emphasized that even if we don't have the technical conditions in this area now, as long as it is a crime scene, we must conduct a serious, careful, and comprehensive investigation. Bloodstains, as small as a hair, or even a small piece of dandruff, as long as they can be extracted, they must be extracted.

Although we don't have a DNA database of ex-convicts like the fingerprint database of ex-convicts, I believe it will be built one day.Some unreasonable cases we encountered in our work may be difficult to solve based on the existing technical conditions, but it does not mean that they will not be solved in the future.

You may feel deeply that our public security organs are undergoing regularization construction, and the requirements for case-handling procedures and evidence are getting higher and higher.Where does the evidence come from, the evidence depends on our usual collection!So I want to emphasize again that as long as there are conditions to investigate the scene, no matter the scene of a major case or the scene of a small case, our criminal technical police will go to investigate..."

I have to admit that "Han Strike" does have a level.

From criminal technology to laws and regulations and case-handling procedures, and from laws and regulations to criminal technology, it is not only easy to understand, but also combines theory with practice.So much so that after listening to it for less than half an hour, Han Yu felt that he could be a criminal policeman.

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

"Please come in."

"Report to Mr. Han, the 110 Command Center said that a person died in a private house in Chonggang District, and asked us to rush to the scene."

"Wei Zhi, even if I'm talking about it until dark, I might as well take the comrades out to the scene. Can you hold a site survey meeting?"

They are all gone, who will let Xianyu come to the stage to talk to later?

But the police situation is an order, Wei Zhi hesitated, and agreed: "Okay, let's go to the scene together. Comrade Han Bo, when we get to the scene, please guide the technical team to investigate."

"Yes!"

……

Plans are always better than change.

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

Originally, I was going to be on stage to speak about the development process of the Binjiang Marine Police and the 98 flood fighting, but the audience all went to observe the criminal scene investigation.

Han Yu didn't want to cause trouble for others, so before Wei Zhi explained, he smiled and said, "Wei Zhi, I happen to have something to do, I'll go to the Shuishang branch first."

"How about the deed report being postponed until next Friday?"

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

"Okay, that's it."

dead, and at the juncture of the upcoming Chinese New Year.

Wei Zhi didn't dare to take it seriously, and when the detachment's police car drove into the yard, he took the walkie-talkie from a criminal policeman, went up to him, 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 contacted Zhao Hongxing, the deputy director of the water sub-bureau, on the phone of Office Lu.

"Zhao Ju, I'm Han Yu, where are you, have you found out Liu Jie's whereabouts?"

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

"Found him!"

"I found it the afternoon before yesterday. He is indeed living here with Wang Xiaoyan. We watched them for two days, but we couldn't figure it out. We still had a headache or didn't want to catch them."

Han Yu looked up at Director Lu, and said with a smile, "You can catch it, but you don't need to stare at it."

"What if he refuses to admit it after being caught?" 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 people have to do with listening to lectures?"

"Of course it has something to do with it. What I listened to was a lecture on criminal technology, which was very professional. Teachers at the police school would not easily teach it to the students. You could only hear it during the on-the-job criminal police training."

Zhao Hongxing was so confused, she held the phone tightly and said, "Don't be tricky, are you sure you can get someone surnamed Liu to speak up?"

The half lecture just now was really worthless.

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

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

"Hong Kong has this technology, and our domestic public security agencies have it too. As long as the suspect leaves biological evidence when committing the crime, as long as the extracted test analysis matches 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, skin tissue and hair left by the suspect, but also the sweat the suspect produced during the crime, and even the grease left by the suspect touching things during the crime."

"grease?"

"As long as the hands are sweating, there is the suspect's oil in the sweat. Anyway, it can be extracted with careful inspection!"

"and then?"

"Then do a DNA test." Han Yu smiled and said confidently: "Those ships that have been burglarized may be in different places. Even if we can find them, it will be difficult to extract the suspect's biological evidence no matter how long it takes, but these We know the situation, but the suspect doesn't!"

Zhao Hongxing came to an enlightened understanding: "Xianyu, you mean to arrest the bastard surnamed Liu first, then scare him, let him know that we have his biological evidence, and send him for DNA, as long as the DNA can be compared , can you take him to court?"

"It's almost the same, but we have to play a full set of acting, we have to act like it, and we have to convince the surnamed Liu that we have this technology."

"Understood, I will call and report to Bureau Wang."

"It's almost Chinese New Year, so hurry up."

"I know."

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

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

……

Every time Liu committed crimes, he had to climb up the anchor chain to the boat.

Committing crimes on the water is different from committing crimes on the shore. It is inconvenient to wear "water tanks" similar to diving suits or gloves when committing crimes on the water. That is to say, Liu must hold the anchor chain tightly to climb onto the boat. The tighter he holds The easier it is to leave biological evidence.

According to the theory of "Han strike", as long as the biological evidence can be extracted and compared, then it can be used as evidence to confirm that he did all the theft of the ships!
As for whether it can be extracted, or even compared, it is not important.

After all, the news is asymmetrical. How did he know that the Binjiang Marine Police and even the Binjiang Public Security Bureau did not have the technical skills at this stage, and even if they did, it would be difficult to find so many stolen ships for investigation.

In short, rely on bluffing next.

As long as the person surnamed Liu can be intimidated, and when the person surnamed Liu speaks up, he can "testify and collect evidence" according to the old method, and there is no need for simple and rude torture or even illegal torture.

The more Han Yu thought about it, the more excited he became. On the way to the Shuishang Sub-bureau, he secretly decided to turn around and ask Wei Zhi. If "Han Crackdown" gave another lecture, he must attend it at that time, and he would organize the police from the Shuishang Anti-smuggling Division to listen.

As long as it is beneficial to work, there is no shame in stealing from a teacher!
(End of this chapter)