Chapter 528: Classification

"Why not choose an easy case?" Captain Pang Jidong felt a little hard to understand.

According to normal thinking, if the benefits of doing each project are similar, then it is definitely correct to choose the easiest project to do. Even if the criteria for judging the difficulty of the project are different, choosing a relatively easy project is always correct.

Jiang Yuan's answer was completely unexpected to Captain Pang Jidong: "Other cases may not involve forensic botany. When I look back and tell you things, you will forget them all."

This is really... Captain Pang Jidong's chest suddenly felt like it was filled with hot air.

"Are you choosing this case for me?" Captain Pang Jidong stood in the cold basement, stunned, his heart hot, his brain confused, his expression dull, and his hands and feet nowhere to stop.

Jiang Yuan smiled frankly: "It's also chosen for myself. I thought the previous cases were enough. You haven't been able to get started here. I think it's too difficult to start directly from pollen. Forensic botany is most practiced in drowning cases. It just so happens that there is one, so let's take a look..."

"It's... it's me who is too dull..." Captain Pang Jidong regretted it very much. In the past few days, he should have worked harder.

Captain Pang Jidong couldn't help but recall that it had been more than ten years. Since he left the category of young people, no one had been so good to him.

Once, when he first entered the industry, his master was extremely good to him. Later leaders, including the director, were also quite good to him. However, the leaders gradually retired, left, transferred... his master also went home to enjoy his old age. The ones who would be so good to him were his wife, then his children. Finally, the focus of his wife and children's concern also changed...

In middle age, the only option left seems to be burning oneself.

"Team Leader Jiang, I..." Captain Pang Jidong's heart was beating thump-thump in his chest.

"You do your best, I do my best. In this way, in the future, if Luojin City has cases that can be done with forensic botany, you can at least catch them." Jiang Yuan didn't give Captain Pang Jidong a chance to complain. Three men talking about this during work, the body in the ice coffin would laugh.

Captain Pang Jidong nodded vigorously, "Find a suitable case, and I will find you..."

"That's not necessary. However, there must be other technical personnel who can do forensic botany. You can look for them later. There is an advantage in the country. The salary for research is low. Add a little subsidy, and there will always be people willing to help." Jiang Yuan thought, normal botanists in the country, no matter how they open their mouths, they won't be bigger than Huang Qiangmin's mouth.

Of course, what Jiang Yuan provides is a one-stop service, and it is not just using the technology of forensic botany, which is another matter.

While talking, the three came to the autopsy room to see the body.

The body's face was swollen, and only two fingerprints were barely taken, which were not matched. One of its thighs had been removed to take bone marrow and diatoms. Even so, the entry point of the body and the identity were not determined.

If the identity cannot be determined, the case is very difficult to carry out.

Lu Jie, the forensic doctor in Luojin City, took out a large number of photos, hung them on the backlight screen, and said, "When the body was sent, there was a clear strangulation injury on the neck, so it was judged to be murder."

As he spoke, he pointed to the photos for Jiang Yuan to see.

Because of the autopsy and storage, the neck position on the body could not be seen clearly. It was much more comfortable to look at the photos.

After Jiang Yuan saw enough, Lu Jie continued, "The body was found in the Jinshui River. The water flow of the Jinshui River is very large, and the river is extremely long. We searched upstream for a long time and did a lot of sampling, but we didn't find any useful clues."

Jiang Yuan pondered slightly and said to Captain Pang Jidong, "This is a disadvantage of the algae community. It is different from pollen profiles. Because the concealment of algae is strong, it cannot be seen directly, so it can only be used for proof, not for directional tools."

Captain Pang Jidong understood this, nodded and said, "It means it can only find the place, use this algae community to prove it is here, but cannot directly find the place through the algae community."

"Almost the same meaning, but we can generally use this to distinguish the type of water body." Jiang Yuan said, looking at Lu Jie.

"It should be fresh water. River water." Lu Jie said.

"River water is the most troublesome. If it is salt water, the general sea area can be judged according to the saltiness. Generally, crime scenes or accident scenes are in the bay, which is relatively easy to find. The algae distribution of lake water also has certain characteristics. River water is the most difficult to determine the location for a long river like Jinshui River." Jiang Yuan introduced it to Captain Pang Jidong.

With Jiang Yuan's understanding, Captain Pang Jidong needs this shallow level of information the most, which helps him borrow expert power in the future.

As for true academic research, it is a bit too much to try to teach Captain Pang Jidong.

"What should we do now?" This was asked by Lu Jie. Jiang Yuan is a forensic doctor, and he is also a forensic doctor. He also wants to make progress.

Jiang Yuan thought for a moment and said, "Two plans. First, do skull restoration. After the skull restoration is done, compare it with the photos of missing persons, and there may be discoveries. Forensic anthropology can also be used, the same meaning, combined with the effect is better."

Forensic doctor Lu Jie smiled. Yes, Jiang Yuan knows skull restoration, and Jiang Yuan also knows forensic anthropology. Although they belong to forensic medicine, it is too much to point to forensic medicine and understand skull restoration and forensic anthropology. Everyone is a person who has read books. Why don't you go to Tsinghua?

Jiang Yuan said a word, and then said, "Second, you can classify the algae to see if it can be limited to a small group, and then look for the scene, maybe the opportunity will be greater."

"Classification?" Lu Jie frowned. He felt that the classification Jiang Yuan said was definitely different from the classification he imagined.

"En, prioritize diatoms. Once other algae are dried, it is difficult to identify the species. In contrast, water has basically no effect on the silicon shell of diatoms." Jiang Yuan introduced it to Captain Pang Jidong, and then said, "Other algae, we also try to do it, and classify as many as possible."

Lu Jie nodded blankly.

Diatoms and other algae were all extracted by him, but why didn't he classify them before? Of course, it's not because he doesn't like it!

In this, there are more than 200 types of diatoms. As for algae, it doesn't make much sense to say a total number. After all, many species do not exist locally, but as a reference, you can look at this data: species.

Even if Lu Jie's head is flattened, it is impossible for him to learn to distinguish the types of algae. It is possible to find a professional algae expert, but this workload is not small, and it is not over after distinguishing the types of algae carried by the body. Later, bottles of samples are sent over, and they have to be distinguished.

Moreover, even if the scene is found in the end, there is still a distance from solving the case.

Therefore, a forensic doctor like Jiang Yuan who solves cold murder cases in one stop, Huang Qiangmin sold it very cheaply.

"Start." Jiang Yuan felt that he had said enough, rolled up his sleeves and started working.

Lu Jie followed silently, wanting to see how Jiang Yuan did it.

He looked...

He looked sideways...

He looked vertically...

He looked leaning against Captain Pang Jidong...

Evening.

Captain Pang Jidong took a trip to get takeout, and saw Lu Jie crying in the corner alone.

A man in his thirties or forties, crying like a fat child with an ugly face and thin hair, Captain Pang Jidong couldn't help but feel a trace of sympathy.

"What's wrong with this." Captain Pang Jidong sat next to Lu Jie and asked softly.

"Detachment Leader Pang, you say, am I an idiot?" Lu Jie asked with tears in his eyes.

If this were a young lady, Captain Pang Jidong would mostly say something warm to people's hearts, but a big man who is so ugly, Captain Pang Jidong can only say truthfully: "If you want to compare with Jiang Yuan, you are indeed an idiot."

"He used the nine-step method, and I also used the nine-step method. Why are the diatoms he screened more than mine, and better to identify than mine? Why does he know 200 types of diatoms..." Lu Jie threw himself into Captain Pang Jidong's arms when he talked about the sad place.

Captain Pang Jidong firmly pushed him away and smiled: "I thought it was something. 200 types, just recognize them slowly."

Lu Jie looked at Captain Pang Jidong blankly: "How many types of green vegetables do you know?"

"What?"

"The difference between diatoms under the microscope is smaller than the difference between green vegetables. If you are given 200 types of green vegetables, can you distinguish each one?" Lu Jie asked seriously.

Captain Pang Jidong: "It sounds like there is some difficulty."

"He also recognized more than 20 other types of algae." Lu Jie said while shaking his head: "He actually recognized all the algae that still have characteristics..."

"Difficulty... quite high?"

Lu Jie laughed: "If you are given 27,000 dogs and choose 20, can you call their names?"

"Might as well try giving me 27,000 ex-girlfriends." Captain Pang Jidong has met many collapsed criminal suspects and victims, sometimes including the criminal police under his hand, knowing how to change the topic.

Lu Jie really laughed out of his nose, and then said: "He also corrected the post-mortem immersion time... tomorrow morning, it's time to take people to sample..."

Lu Jie's voice became smaller and smaller. Obviously, the blow received at the scene and the story heard were completely different.

Captain Pang Jidong just smiled. What is algae? Pollen is perverted. And if you want to talk about annoying, look at how annoying the bureau leaders are now. ===== CHAPTER 529 =====