Chapter 1185: They Just Think It's Fun

"Hello, which unit are you from? Do you have credentials? Please show them."

Wang Chuanxing got up early in the morning, with dark circles under his eyes, stood at the entrance of Building 10, and began to register the arrivals.

The sign hanging at the entrance of Building 9 is "Taihe Working Group" and "Jiang Yuan Special Case Team", while Building 10 is the new auditorium built this year. In Huang Qiangmin's words, it is at the level where a hero meeting can be held in the county.

After Building 10 was built, it was basically used for meetings and training sessions. This time, Jiang Yuan decided to open a class, and Huang Qiangmin arranged it here for the first time.

In addition to Building 10, the scale of the Ningtai County Bureau Reception House has also been expanded and rebuilt. It just happens to arrange the accommodation for the police officers who come to study.

The hardware conditions are complete, and Wang Chuanxing and others don't need Jiang Yuan to command, and they automatically and consciously arranged the process of the study class.

On the organization of activities, Xu Taining's screening is the most demanding.

Ordinary meetings and training have some leaks. As long as the parties don't care, they will pass with a smile. Screening can't tolerate this. Once a problem occurs, the participants themselves don't know how to make up for it.

This point is similar to flood fighting and disaster relief, and building dikes. The individualism in American movies cannot understand collectivism in China, because they lack similar experience and don't understand that some mistakes cannot be borne by individuals, so they must be responsible.

And for police officers who have participated in Xu Taining-style screening many times, organizing an event is too easy.

Even if the number and scope of guests greatly exceeded expectations, Wang Chuanxing and others still did it in an orderly manner.

Only in their spare time, they called Huang Qiangmin in a complaining tone: "A wave of people came from the Pingzhou group. It should be organized by their provincial department. One or two people came from each prefecture-level city. They said they would solve the accommodation problem themselves, so I gave them buffet tickets."

"I know." Huang Qiangmin's voice was very steady, as if it came from underwater.

Wang Chuanxing said with a sense of ownership: "There must be twenty people. When arranging positions later, it is estimated that it will be a bit troublesome."

"Opening a shop is not afraid of big-bellied men." Huang Qiangmin's voice was muffled, and said: "By the way, the Chayong Municipal Bureau that came before has been finalized. If they have any requirements later, you can arrange them directly, write down the items clearly, and ask them to sign."

"Understood, you can sign the bill." Wang Chuanxing agreed.

Huang Qiangmin coughed twice and said: "Don't say it so directly. Give them enough experience, and it won't take much effort."

"Yes." Wang Chuanxing finished the call with Huang Qiangmin and continued to stand guard, handling various procedures for the guests.

Although it is said that they came to Ningtai County to study, the criminal police who can afford travel expenses and can be sent by the unit are at least "police officers" in various places. They are local dragons that they may not be able to ask for when they go to other places to do things. This time they were attracted, so they must be arranged properly.

All criminal police in the world are one family. You can't just be one family when you go to someone else's house—Little Joseph.

Inside Building 10, the layout is also set to the standard of a meeting. A group of interns prepared tea and snacks for the big guys, and then stood in the corner of the auditorium, holding the mentality of listening to secrets, looking forward to it.

Jiang Yuan was still chatting with the guests at this time.

On the temporarily set up podium, many case files were piled up, all of which were small cases that had occurred in Ningtai County recently, and all were moved by Jiang Yuan to be used as teaching aids.

The police officers who came to study were all knowledgeable. They flipped through them casually and knew that they were taken according to time.

So many cases, and they are all unsolved. It cannot be said that there is no screening at all, and it is basically equal to no screening.

As everyone knows, small cases are not necessarily solved. Some are quite difficult to solve.

Because there are too few traces left.

Jiang Yuan dared to pile so many cases here, which itself explains the problem.

However, criminal police have a spirit of not believing in evil. Even if the evidence is in front of them, they have to examine the source and authenticity of the evidence. Jiang Yuan took a pile of cases out, and naturally someone tried it.

Jiang Yuan also answered casually, and by the way, he had a corresponding understanding of everyone's level.

Since the study class is opened, it must be effective, otherwise, he would be wasting his time.

Different people will have different views on the case, and the angle of solving the case is even more strange.

Generally speaking, ordinary criminal police will use one or two, at most two or three schemes to solve the case. Classic ones, such as the cowboy sheriff in some American movies, mostly just look at the scene casually, and then look for people based on the motive and method of the case. For the wild ones, they can also use physical interrogation to obtain information.

And in various provinces and cities in China, the techniques and modes used by everyone have their own focus. This is not only related to the local police's case-handling habits, but also related to local case-handling conditions.

It is like the police in Shannan Province and Luojin City can try forensic botany. Even if other places have such ideas, they basically cannot achieve it. Then, until the last step of the mountain and water, they will not use such a scheme.

Such regional differences are often the reason why the perpetrators of flowing crimes are caught. It is equivalent to a lock, wandering among many keys, and there is always a time to be opened.

Jiang Yuan chatted with the police officers from other places while waiting for time.

When the watch time reached 9 o'clock, Jiang Yuan stood up and said: "Let's start. I sent some information in the group before, and everyone should have seen it. We use practical cases as explanations. Now we are conducting the Sunshine Supermarket theft case. The case itself is very small. The property loss of the stolen goods does not exceed 5000 yuan. In fact, it is only about 3000 yuan, but an interesting point of this case is that the perpetrator took a towel at the scene, which made our forensic botany useful."

Jiang Yuan waved his hand, and Wang Chuanxing, who had returned to his post, immediately put out the PPT prepared last night.

The first few pages were detailed descriptions of the case. Jiang Yuan didn't pity to manipulate the remote control to brush them past, and went straight to the photos under the electron microscope.

The pollen and spores that were as small as a hair appeared straight and grand in front of everyone.

Jiang Yuan coughed twice and said: "I will tell you about some basic principles of our forensic botany. Take this as an example. Distinguishing the varieties of pollen and spores, and counting them is the most basic first step... Judging the living environment of these plants based on sporopollen is the second step... The third step is the most difficult, which is to determine the location of these plants based on the sporopollen spectrum."

Jiang Yuan looked back at everyone listening seriously, nodded again, and said: "These steps are actually similar to DNA and footprint identification. Sometimes it requires skills, sometimes it requires a little luck, and sometimes it requires running a lot of roads... Of course, doing a good job of position control is also very important. For example, in Ningtai County, and Qinghe City, our preparation work in forensic botany has already been done a lot..."

"Oh, Ningtai County has already made a plant map, right?" Someone reacted.

"Yes." Jiang Yuan nodded. This cost the funds of a building and can be used as a benchmark to display.

"So..." A criminal police officer here turned the conversation: "What did that towel wipe? Can't you take DNA?"

"The perpetrator should have used it to wipe clothes and shoes, there is no sweat stain." Jiang Yuan explained.

"That can still..."

Jiang Yuan waved his hand: "Let's come to the first solution first. Don't look for so many routes. Now, I will teach you how to save and protect the evidence of forensic botany..."

He didn't intend to spend too much time on forensic botany. After this step was finished, it was about 10 o'clock, and then he completed the matching on the map himself.

This is professional stuff. Don't expect to teach others in a few days.

Everything was completed, Jiang Yuan took out the Ningtai County map, zoomed in, drew a circle on the spot with a laser pointer, and said: "The perpetrator should have stayed nearby for a long time. Next, we need on-site investigation. Well, our police officers have already gone over. Let's change a scheme now..."

"Change scheme?"

"What scheme to change?"

"Solve the same case twice?"

The criminal police at the scene were a little confused and discussed one after another.

Jiang Yuan coughed twice: "Because it is the first case today, and there is relevant evidence sent over, we will solve it twice first, just to make a comparison. We won't be so wasteful later. Try to solve one case with one scheme. Well, let's borrow tool traces for the second round..."

"Isn't it footprints?" Those who were familiar with Jiang Yuan's case-handling style couldn't help but shout.

"If it's footprints, everyone is relatively familiar with it. Do you want to come again?" Jiang Yuan hesitated.

"Compare it once." Those who watched the excitement only felt it was fun at this time. ===== CHAPTER 1186 =====