Chapter 1097: On Species

"This maggot is not a local variety. Specifically, how is this judged?" Li Chang asked, trembling slightly.

Although his research topic when he was a graduate student was not in the field of forensic entomology, if there was such a good direction and practical projects, it would not be impossible to retake a doctorate to do research in this area later.

Jiang Yuan lacked a bit of academic sensitivity and didn't seem to be too interested in academics themselves. He said casually: "The appearance of maggots of different varieties in different places is not quite the same, it should be recognizable, right."

"I know that flies have different distribution areas. However, ours is a blowfly, right? There are so many varieties of blowflies, and the distribution intervals are also different. There should be overlaps between them. How did you see it... I mean, do you need to check the books to compare, or do a DNA? For the sake of accuracy..." Li Chang's voice became smaller and smaller. The methods he could think of were the most basic methods in books. When he said them to Jiang Yuan, as a graduate student at Zhejiang University, he had a little bit of shame.

Jiang Yuan smiled and said: "If you want to send it for inspection later, you can do a DNA, so it's easy to issue a report. There is no need to check the books. You can recognize the variety of blowflies at a glance. As for the regional distribution, many books and papers are just like that."

Li Chang had countless languages he wanted to complain about, but he couldn't spit them out. In hesitation, he decided to ask the most difficult one: "If you don't check the books for regional distribution—I mean, without relying on the range given in books and papers—how do we judge the distribution area of different varieties of blowflies?"

"It's not that I don't rely on books and papers, but they are all references. It mainly depends on the situation of the corpse itself." Jiang Yuan didn't talk about such a grand problem, but pulled it back to the front-line work, and said: "Look at the blowflies on this corpse, there are actually several kinds. Red-headed blowflies are cheap species, generally distributed everywhere, and bright green flies are the same, but there are black blowflies and scarlet-faced naked golden flies here. Although they are also distributed in small amounts locally, you have to look at the period."

"Eh?"

"The larvae of the scarlet-faced naked golden fly are smaller and fewer in number. The second-instar and third-instar maggots are obviously thin and weak, which shows what? It shows that in the process of competing for the right to develop on this corpse, they are not dominant. The reason, it is likely that they came too late, or they are not adapted to the environment in the early or middle and late stages of the corpse, or both." Jiang Yuan made a brief summary.

Li Chang couldn't help but turn his head to look at the piles of maggot corpses, but let alone distinguishing which one was the scarlet-faced naked golden fly, he couldn't even see which maggot was the thin one.

Taking humans as an example, 3-year-old children are all small, but who is small because of young age, who is small because of variety (gene), and who is small because of malnutrition—in the case of few variables, Miao Ruixiang can compare sizes, but after the variables increase, the question of who is smaller becomes difficult.

This problem in the human environment is generally asked to parents. And for blowflies, it is asked to its parents.

The development speed of different varieties of blowflies is slightly different, and the difference in development speed of different varieties of flies is even greater.

And Li Chang thought from the perspective of a student, knowing the type of fly, recalling or checking its development speed, this is what a normal scholar would do. But you see the development speed of the fly, and you go back to infer its type, and even its development environment, this is too abnormal!

"This... how is this judged again?" Li Chang was full of expectations for the moment of "hearing the Tao in the morning".

Jiang Yuan cruelly interrupted his fantasy and said: "This topic is too complicated to talk about. Let's take this as a direction and investigate."

When sending for inspection and going to court, Jiang Yuan naturally needs to explain this problem, but that is also forming written materials. If necessary, he can also find someone to ghostwrite, so he doesn't need to think about it now.

Jiang Yuan made the final judgment based on LV6 fly identification, and this theoretical basis is not something that a little rookie like Li Chang can understand.

Jian Louyuan couldn't get a word in on the side. Hearing that they had finished chatting, he hurriedly said: "Team Leader Jiang, then the first scene, where do you think it is?"

"Baijiang Province." Jiang Yuan flipped through the maggot corpses on the dissection bed and answered very clearly.

Jian Louyuan was stunned and hurriedly said: "Good."

He didn't expect it to be so smooth. This is a corrupt corpse homicide case, how can it be so smooth.

Jian Louyuan made a phone call while walking out the door, ran to a few dozen meters away, took a deep breath, and felt comfortable as if he had come alive.

Wei Shiyan was left behind. Before he could react, he saw Jiang Yuan waving his hand and saying: "Little Wei, you come, wash these clothes."

"These have become broken pieces of cloth." Wei Shiyan looked at the textiles pulled down from the corrupt corpse and worried.

"If you don't know how to wash..." Jiang Yuan looked left and right and said: "Call Shen Yaowei over to teach you."

Miao Ruixiang is boiling corpses here, so the one who is more familiar and good at washing clothes is Shen Yaowei.

After a while, Shen Yaowei covered his nose and entered the door.

"Come on. Team Leader Jiang said to get these clothes out and distinguish what brand or type they are..." Wei Shiyan said roughly.

Shen Yaowei exhaled, looking at the clothes soaked in corpse water, his face full of sorrow.

Wei Shiyan muttered: "This is purely a forensic job."

"Although Team Leader Jiang transferred his work to us, he mainly wants to train us." Shen Yaowei said.

"Do you think it's training?" Wei Shiyan raised his eyes and said: "Team Leader Jiang's technology is indeed awesome, but the personal clothes of the corpse are generally not the responsibility of the forensic doctor?"

"Now it is also the forensic doctor who is doing it, we are just doing OEM." Shen Yaowei said, and then said: "Credit will not fall for no reason, opportunities will only be left to those who are prepared."

Wei Shiyan smiled: "The only thing that falls for no reason is work, where is the credit."

Shen Yaowei smiled contemptuously.

Wei Shiyan instantly interpreted Shen Yaowei's expression, became more serious, and said: "You missed something recently? Third-class merit."

"Not talented, second-class merit." Shen Yaowei smiled lightly, his voice was round and square.

Both sides were originally casual words, and when they reached this point, the two were also naturally looking up.

Shen Yaowei's pupils entered Wei Shiyan's eyes, and Wei Shiyan's pupils shot into Shen Yaowei's eyes. Both of their expressions became serious.

"You are worth a second-class merit?" Wei Shiyan looked at Shen Yaowei up and down and said: "Second generation of police."

"Jiang Yuan said it's worth it." Shen Yaowei smiled: "Are you a Brahmin of Lanyue City?"

Wei Shiyan nodded upwards and said: "Kshatriya. What did you use to exchange for second-class merit?"

"Loyalty and hard work." Shen Yaowei answered very piously.

Wei Shiyan smiled.

Shen Yaowei looked at Wei Shiyan calmly.

Wei Shiyan smiled for a long time and said in surprise: "Really?"

"That's it. It doesn't feel that smelly anymore, wash it." Shen Yaowei said, took a brush, and began to try to peel the rotten meat from the clothes.

Wei Shiyan stood silently to the side and watched for a few seconds, then began to brush the belt. ===== CHAPTER 1098 =====