National Forensic Doctor

"Hello, which unit are you from? Do you have your ID? Please show it to me."

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

The door of Building 9 was hung with signs of "Taihe Working Group" and "Jiang Yuan Backlog Special Team", and Building 10 was the newly built auditorium this year. In Huang Qiangmin's words, it was at the level of holding a meeting of heroes and models in the county.

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

In addition to Building 10, the scale of the Ningtai County Bureau Guesthouse was also expanded and renovated. It was just right to arrange accommodation for the police officers who came to study.

With complete hardware conditions, Wang Chuanxing and others did not need Jiang Yuan's command, and they automatically and consciously arranged the process of the study class.

In terms of organizing activities, Xu Taining's investigation is the most challenging.

If there are some mistakes in ordinary meetings and training, as long as the parties do not care, they can just laugh it off. However, this is not allowed in the investigation. Once a problem occurs, the participants themselves do not know how to make up for it.

This is similar to flood relief and water control and embankment construction. The individualism in American movies cannot understand the Chinese collectivism because they lack similar experience and do not understand that some mistakes cannot be taken responsibility by individuals, so they must be responsible.

For the police who have participated in Xu Taining's investigation many times, organizing an event is too easy.

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

Only when they were free, they called Huang Qiangmin in a complaining way: "Pingzhou group came, it should be organized by their provincial department, one or two people from each prefecture-level city. They said they would solve the accommodation problem themselves, so I gave them tickets for the buffet."

"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 about 20 people. It will probably be a bit troublesome to arrange the positions later."

"A shop is not afraid of big-bellied people." Huang Qiangmin said in a muffled voice: "By the way, the people from the Chiyong Municipal Bureau who came earlier have been finalized. If they have any subsequent requirements, you can arrange them directly, write down the matters clearly, and ask them to sign."

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

Huang Qiangmin coughed twice and said: "Don't be so straightforward. The experience is enough and it doesn't take much effort."

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

Although they came to Ningtai County to study, the criminal police who could afford the travel expenses and could be sent by the unit were at least "police officers" from all over the country. They were local dragons that they might not be able to ask for when they went to other places to do business. This time they were attracted here, and they had to arrange it almost the same.

The 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

In Building 10, all the arrangements were set up according to the standards of a meeting. A group of interns prepared tea and snacks for the big guys, and then stood in the corner of the auditorium, looking at the stage expectantly with the mentality of listening to secrets.

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

On the temporary podium, there were many case files piled up, all of which were small cases that occurred in Ningtai County recently, and they were all moved by Jiang Yuan as teaching aids.

The police who came to participate in the study were all knowledgeable. Just flipping through them, you can tell that they were brought here according to time.

So many cases, and they are all unsolved. It can't be said that there is no screening at all, but it is basically the same as no screening.

As we all know, small cases are not necessarily solved, and some are quite difficult to solve.

Because there are too few traces left.

Jiang Yuan dared to pile up so many cases here, which in itself is very telling.

However, criminal police have a kind of unbelief. Even if the evidence is in front of them, they must examine the source and authenticity of the evidence. Jiang Yuan took out a bunch of cases, and naturally someone tried it.

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

Since the class has been opened, it must be effective for people to learn, otherwise, he would be wasting his time.

Different people have different views on the case, and the angles of investigation are even more bizarre.

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 go to find people based on the motive and method of the case. The more barbaric ones can also use physical interrogation to obtain information.

In various provinces and cities in China, the skills and models used by everyone also have their own emphases. This is related to the local police's case handling habits and local case handling conditions.

Just like the police in Shannan Province and Luojin City can try forensic botany, even if other places have such ideas, they basically cannot realize them. They will not use such schemes until they reach the last step.

This regional difference is often one of the reasons why the criminals who commit crimes on the run are caught. It is like a lock that is moved among many keys and will eventually be opened.

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

When the watch reached 9 o'clock, Jiang Yuan stood up and said, "Let's get started. I sent some information in the group before, and everyone should have seen it. We will explain it with practical cases. Now we are conducting a theft case in Sunshine Supermarket. The case itself is very small, and the loss of stolen property does not exceed 5,000 yuan. In fact, it is only about 3,000 yuan. But the interesting point of this case is that the criminal took a towel at the scene, which gives us a place to use forensic botany."

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

The first few pages were detailed descriptions of the case. Jiang Yuan manipulated the remote control without mercy to swipe it over and went directly to the photos under the electron microscope.

One by one, one by one, one by one!

The pollen and spores as small as a millimeter just stood upright and appeared in front of everyone.

Jiang Yuan coughed twice and said, "Let me tell you about some basic principles of our forensic botany. For example, distinguishing the types of pollen and spores and then counting them is the most basic. The first step... judging the living environment of these plants based on the pollen is the second step... The third step is the most difficult, which is to determine the location of these plants based on the pollen map." Jiang Yuan looked back and saw that everyone was listening carefully, then nodded and said, "These steps are actually similar to the identification of DNA and footprints. Sometimes you need skills, sometimes you need a little luck, and sometimes you need to run a lot... Of course, it is also important to control the position well. For example, Ningtai County and Qinghe City, we have done a lot of preparatory work in forensic botany..." "Oh, Ningtai County has already made a plant map, right?" Someone responded. "Yes." Jiang Yuan nodded. This cost a building and can be displayed as a benchmark. "So..." A criminal police officer here changed the subject: "What did the towel wipe? Can't we take DNA?"

"The criminal should have used it to wipe his clothes and shoes, there are no sweat stains." Jiang Yuan explained.

"That's OK..."

Jiang Yuan waved his hand: "Let's start with the first solution. There is no need to find so many routes. Now, I will teach you how to preserve and protect forensic botany evidence..."

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

This is a professional thing, and you can't expect to teach others in a few days.

After everything was done, Jiang Yuan took out the map of Ningtai County, enlarged it, and drew a circle on the scene with a laser pen, saying: "The criminal should have stayed in this area for a long time. Next, we need to conduct a field investigation. Well, our police have gone there, let's change a plan now..."

"Change the plan?"

"Change to what plan?"

"Solve the same case twice?"

The criminal police at the scene were a little confused and talked about it.

Jiang Yuan coughed twice: "Because this is the first case of the day, and there is relevant evidence sent over, we will solve it twice first, just to make a comparison, so that there will be no waste in the future, and strive for one solution and one solution. Well, we will borrow tool traces in the second round..."

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

"As for footprints, everyone is more familiar with them. Do we need to do it again?" Jiang Yuan hesitated.

"Compare once." The onlookers just thought it was fun at this time.