Chapter 758 Our Solution

The technology for making DNA for dogs is slightly later than that for humans.

The main thing is to solve the problem of genetic markers. We need to determine which genetic markers are stable and can be used for comparison and testing. The Ministry's Physical Evidence Identification Center specializes in this. Around the beginning of 2000, it first completed the DNA identification of cows. It was mainly used for "why do you say this cow belongs to you?"

The ancient method of marking cattle and horses is still not sure by doing a paternity test for cattle, especially if the other party intends to take your cattle away, or even steal it, whether there is still a mark on the buttocks is a matter of debate.

As for DNA testing of dogs, the more famous case is a case in Estonia. A young woman was bitten to death by a dog in a village. The forensic doctor used the dog hair and saliva spots collected from the woman's coat to conduct DNA tests on 6 dogs belonging to several nearby households. After inspection and comparison, the suspect dog was finally identified.

In modern times, dog DNA identification has become very simple and easy, and the development direction of this technology has shifted to rapid DNA screening. The main ones are rapid test kits, used by departments such as market supervision. They can usually quickly detect the genes of dogs, foxes, minks, cats, ducks, rats, etc.

That is to say, you can wipe a piece of meat product of unknown identity and insert it into the box. In a few minutes, you can know whether it contains dog, fox, mink, cat, duck, rat, etc. .

The so-called selling of dog meat with sheep's heads has been around since ancient times. In modern times... there are horse meat incidents in 16 countries in Europe, where horse meat is used to pass off as beef. The type of DNA testing kit illustrates another less interesting phenomenon. That is to say, the meat on the market has reason to be suspected of being adulterated, and the source of adulteration may not necessarily be dog or duck meat, but cat meat, fox meat, mink meat...

In addition, raccoons belong to the canidae family and are often used to pass themselves off as dog meat.

All in all, most of the cases that the Evidence Identification Center performs DNA on dogs are economic cases, so suddenly there is a murder case involved, or a serious case, and the technicians who handle it are actually quite excited.

Before Jiang Yuan could finish the autopsy, the technician from the Physical Evidence Identification Center brought the report to his door all the way.

"Well, the body of the dog you want to identify is a horse dog." The technician asked for directions and looked very happy when he saw Jiang Yuan and others.

"Ah... Captain Lou is here. Could you please bring it here in person?" Zhan Gong was performing skull restoration surgery and was dizzy. He came with the skeleton in his arms to greet him and introduced it to Jiang Yuan.

"We are so acquainted, so we won't shake hands... Hello, Medical Examiner Jiang, I am Lou Fengguo..." Lou Fengguo ran up and stared at Jiang Yuan, looking like a fan who bought the front row at a concert.

The report he held in his hand also looked like the tickets bought by the fans in the front row. Jiang Yuan thanked him repeatedly and took it over to look at.

Lou Fengguo introduced from the side: "The Malinois is a Belgian shepherd dog, and it is also a common working dog. However, this kind of dog is also one of the dogs that gets into most troubles. It is particularly easy to get excited. When working, the working hours are long, but it is used as a pet. In fact, it is very easy for a dog to get into trouble, especially a dog. The character of the dog is already very unstable, and it becomes even more unstable after the relationship.”

Jiang Yuan nodded and asked, "Where's this one?"

"Pure." Lou Fengguo clicked on the watch in the report with his hand, and then said: "The price of horse dogs is not expensive. Of course, there may be particularly expensive ones, but the average purebred horse dog is only one or two thousand, two or three. It depends on where you bought it from. It’s troublesome to raise this dog in the city. It eats a lot, takes a long time to walk, and tends to shed.”

"But if it is used as a police dog or for work, it is very suitable, right?" Zhan Kong didn't want to look at the skull anymore and sat down to talk.

Lou Fengguo nodded: "That's for sure. Horse dogs are very capable of working. They can climb trees, climb over walls, and have super bounce. Police horse dogs can easily go up to the second floor. They are also very vigilant and can bite harshly. . In addition, if you keep it as a pet, it will be excited for a long time and is easily excited. It is perfect for a working dog.”

"Can we find its owner or related personnel through DNA?" Jiang Yuan naturally went to solve the case by taking its DNA.

Lou Fengguo became excited at this time, and the short hairs on his arms stood up. He said so much, but what he was waiting for was Jiang Yuan's words.

"If it were someone else, I would probably have to wait for you to get the DNA and compare it. The pedigree of horses and dogs is still very complicated." Lou Fengguo said with a proud smile: "But I still have some experience in this aspect."

"Hmm... do you want to join our task force?" Jiang Yuan's words were exactly what Lou Fengguo wanted, but they directly surprised Lou Fengguo.

Lou Fengguo couldn't help but touch his short hair: "You don't even ask me about the technology I plan to use?"

"I don't know much about DNA testing." Jiang Yuan replied. Then he thought that the other party was not just a perfunctory leader, so he added: "What technology are you going to use?"

"Dogs of different bloodlines must have some stable DNA inheritance. The origins of our domestic dogs are relatively simple. It just so happens that I have some knowledge in this aspect. Well, to be honest, people in the circle tell me that I understand The Dog Emperor is here." Lou Fengguo became proud as he spoke.

Probably a bit proud indeed.

With the amount of outstanding people in the capital, since Lou Fengguo dares to claim the title of emperor, he must be at least a savvy dog ​​above LV3. If it were not a circle of pure enthusiasts, Dong Du of Lou Fengguo might still be able to rise.

Jiang Yuan couldn't help but think of the first skill he acquired, the LV5 dog food skill, which was inherited from the victim Chen Manli. Chen Manli had not received any professional training, but was purely a hobby and talent, and was completely self-taught, reaching the level of LV5.

Jiang Yuan estimated that if he entered the DNA laboratory, his DNA identification level would be at most 8, and it is very likely that he would only be at the level of 4.

This thing is so-called easy to learn but difficult to master. The simplest operation is similar to self-testing nucleic acid, but if it is a little more advanced, the difficulty is theoretical level. For example, the instruments and equipment used, which country and which company produced them, must be particular, otherwise the results will be different.

The processing of test samples is even more particular, what kind of aqueous solution is used for soaking, the homogenization treatment scheme, temperature, enzyme, the type of solution that is repeatedly added, especially the primer, the complexity is not exaggerated to LV5.

Although the DNA identification of different organisms is similar, as Lou Fengguo said, to trace the origin of the dog and to determine some of its stable genetics, the difficulty soars.

"Then I'll leave the task of finding the dog to you." Jiang Yuan made the decision quickly.

Lou Fengguo was a little uncomfortable and asked, "Don't you want to investigate?"

Jiang Yuan looked at him and put on his gloves again. While preparing to continue the dissection, he asked, "Do you really understand dogs? Can you trace the bloodline and origin of this dog through the existing remaining bones?"

Lou Fengguo immediately said, "It's no problem to trace the bloodline, but tracing the origin may require a little luck..."

"That's it." Jiang Yuan interrupted Lou Fengguo.

Lou Fengguo: "Is that all?"

"Well, everyone from top to bottom is concerned about this case. I am from Ningtai, and I don't have the power to manage you..."

"How could it be? With your current reputation, Captain Jiang..."

Jiang Yuan waved his hand: "What I mean is that this case is expensive and involves a lot of people. Not only the Zhengguang Bureau, but everyone from top to bottom is paying attention to it. I don't need to manage it one by one, and I don't have time..."

"Captain Jiang, don't say scary things." Zhan Kan hurriedly stopped Jiang Yuan and said, "I feel a little cold."

Jiang Yuan said "Oh" and changed his tone to a gentler tone, saying: "Captain Lou, welcome to join the task force. Just do things as well as possible. Tao Zhi and others are watching everything you do."

...

Not only Tao Lu was watching, but Qi Changye and his colleagues were getting more and more anxious.

After 24 hours of personal efforts, Qi Changye couldn't wait to come to the anatomy center.

The gray words "Dissection Center" were written on the wall. From a distance, it looked like an ordinary building, but in Beijing, nothing was ordinary.

The corpses had to be piled up to form a mahjong table and a half to form a scale and attract attention.

Before entering the door, Qi Changye scratched his hair, making it look messy as if it covered his thinking head.

"Captain Jiang..." Qi Changye entered the door with a shrill voice.

When Jiang Yuan heard the shrill voice, he first looked at the skeleton on the dissection table carefully to make sure it was not the one who shouted, then turned around and looked at Qi Changye, saying: "Chief Qi, I haven't finished the dissection here yet... Is there another corpse?"

"I dare not, alas... I don't know." Qi Changye sighed, and then said: "We examined it all day yesterday and encountered some problems."

"What problems?"

"No one really knows what these corpses are about." Qi Changye said a little solemnly and a little puzzled: "I saw them coming this way with my own eyes that day."

Jiang Yuan frowned slightly when he heard it. Indeed, from Qi Changye's perspective, the body was most likely left behind by the previous spy case, and there must have been some rumors...

"Did the murderer run away?" Jiang Yuan gave a guess.

"All ran away? Not likely." Qi Changye also agreed with Liu Jinghui's speculation. This way of burying the body requires several people to work together.

Moreover, Qi Changye felt that if four or five people were to form a team to bury the body, then the team could not have only four or five people, because something might happen among them, they might get injured or ask for leave. If there were a shortage of people, either others would take on all the responsibilities, or they would have to make up for it.

Additions are the most likely scenario, so there should be quite a few insiders.

Furthermore, in the sequence of spy cases, the level of these insiders is probably not high, and it is normal for actions to be lower than intelligence in the organization. Therefore, it is unreasonable for all the insiders to run away when many people have been arrested.

Qi Changye was silent for a moment, then asked in a low voice: "Have you found my special information?"

"No one who meets the requirements for now." Jiang Yuan spread his hands, thought about it and said: "But it is impossible to find all the bodies buried underground."

"This... Alas..." Qi Changye sighed.

Seeing this, Jiang Yuan coughed twice and said: "If things don't go well for you, why don't you try our method?"