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The next day, Zhang Cheng went back to sleep. Today, Wang Xiaohao and Wei Yingfa were on duty, and Bai Song took Li Junfeng, Hawul, Zhang Ning and Ma Yibin out to investigate the case.

The five people were divided into two groups, Ma Yibin took Li Junfeng, and Bai Song took Hawul and Zhang Ning.

There are many labor markets in Shangjing. One is the "talent market" for recruiting college students and the other is the "labor market" for recruiting manual workers.

If a city like Shangjing wants to operate, it needs tens of millions of labors to provide services, and the daily consumption is astronomical. Taking water as an example, it only takes three days to go to Beijing to consume a West Lake.

...

From the bones of the corpse, it is completely impossible to judge the identity and educational background of the deceased, but from the perspective of probability, no one has reported the death for so long, so there is a high probability that it will be migrant workers, so the main thing to look for is the labor market.

Since there are many hospitals in the nearby jurisdiction, including hospitals like Xiehe, there are a lot of people engaged in labor services nearby, and they are messy.

In the morning, everyone looked for a lot of places, but no one had such an impression. And Bai Song also heard some bad news, that is, many foremen can't remember the people under them. They have several people coming in and out every day, and they don't have any impression after more than a week, unless this person caused him trouble.

In this case, trying to find out who is missing is undoubtedly looking for a needle in a haystack.

China is really too big, and it is impossible to exhaust the missing people. Apart from anything else, there are at least millions of Lao Lai who run outside to hide every year, and some have died for one or two years without anyone knowing the identity of the deceased...

In the afternoon, everyone heard the good news. Through unremitting efforts, DNA was successfully extracted from the bones of the deceased. A preliminary identification has been made and it has been sent to the First Research Institute.

Because of this, Bai Song called Senior Brother Pan Chen.

"You don't need to worry too much, brother," Pan Chen is not as persistent as Bai Song: "My teacher is here too. He is a leader in Y-STR technology and is well-known in China. He should give you what you want as soon as possible."

"Brother, can you tell me what technique this is..." Bai Song said that he didn't understand at all.

"You should be fortunate that this one you encountered is a male deceased. If it is a female deceased, it is very troublesome and requires passive comparison. It is purely a Mongolian answer, and the male has an ancestral Y chromosome." Pan Chen said: "You know, That is, when your Y chromosome excludes the mutation, the Y chromosome of you and your ancestors 3000 years ago is one. Y-STR detection technology is a necessary supplement to the autosomal STR and mtDNA genetic marker technology, which is used in the migration process of humans. Among them, the Y chromosome forms a genealogical and regional inheritance, so through it, the family and ancestry of the deceased can be traced back. Not only that, because there are tens of millions of Y chromosome databases in our database, which can be analyzed through Y-STR technology Traceable.” (The technology has been disclosed on the Internet, and editors should not slide it by hand)

Speaking of this, Pan Chen continued: "As for the specific DNA profile, the domestic technology is not yet mature. I can only say that I will do my best. If I'm lucky, I can even find out which village he is from."

"That's enough!" Bai Song was overjoyed: "The new technology is amazing!"

"It's not a new technology, it's only when the application is more mature, DNA imaging technology can be considered a new technology," Pan Chen said: "Then I'll be busy."

"Okay, brother, you have worked hard." Bai Song didn't talk nonsense, and hung up the phone directly.

After hanging up the phone, Bai Song said to everyone: "Okay, let's not be a headless fly. Wait until the brother can find the genealogy of the deceased, and then go to one place to ask who has the missing person. ."

"What do you mean?" Hawul asked.

"I'll call Sergeant Ma, and I'll tell you later." Bai Song sighed, "Let's compare with others, this is illiterate..."

Everyone chose a meeting at the entrance of the labor market. Hearing what Bai Song said, they were all shocked. These five people have been searching here for a long time. They have not eaten any food and have no clue, and they can directly trace the source through technology. A mid-level and high-level one is totally different.

"Is this the boss?" Li Junfeng admired after hearing this: "With just such a bone, he can actually find out his ancestry... this..."

Li Junfeng and Zhang Cheng are both from Shandong Province. Hearing that Senior Brother Pan Chen has such a high fighting capacity, he no longer knows what to say and can only say that he wants to cry.

"Oh..." Ma Yibin also felt a little speechless: "Look at people, I deserve to be in the police station for a lifetime."

"I don't think I deserve to be a policeman," Li Junfeng admired.

"Once it's OK, don't be poor. People are pure researchers, and after a technology matures, it will gradually be used for our daily work. The division of labor is different. If you ask him to come to the police station to deal with an old lady fighting, he can't do it", Bai Song Can only be so comforted.

"By the way, if this is a woman, there is no way?" Zhang Ning asked.

"Well, this method cannot be adopted. But there are other methods. The DNA portrait he said will definitely mature gradually in the future." Bai Song said, "That's why many unsettled cases were solved by the police after more than ten years. Technological progress is really great."

"But women are killed more than men..." Zhang Ning said, "I read the news..."

"No," Bai Song interrupted Zhang Ning: "It's just news selling anxiety~lightnovelpub.net~ It makes you feel that women are weaker and easier to be violated. In fact, most of the deaths in homicides are men, because Men are more combative by nature. I remember a statistics conducted abroad, and the ratio is probably 3 to 1."

"That's it," Zhang Ning is also very smart: "These media are just selling anxiety."

"Selling anxiety, there is no profit," Bai Song sighed: "Everyone didn't have lunch, right? Let's go and eat."

"What to eat?" Ma Yibin said, "I'm the oldest, I'll treat you."

"I look at the fried cake on the roadside. There are no people waiting in line. It should taste good, right?" Zhang Ning said, "They buy them in the labor market there."

"How can I eat this as a treat?" Ma Yibin said, "It's good."

"Just eat this, it smells good." Bai Song also knows that Ma Yibin is more economical every day: "People can eat what we can't eat. We often eat these when we go out to handle cases."

"Yes, the roadside stall is the most fragrant!" Li Junfeng said.

"All right, then add more meat, you are welcome." Ma Yibin is also hungry now, smelling the stall next to it is really fragrant.

"Yes," Bai Song said: "I want to eat a large portion."

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