Wan Quan looked at Jiang Yuan and felt unaware of his severity.

As a policeman, Wan Quan only needs simple thinking and can easily draw a conclusion that it is difficult to solve the case based on just a pool of blood and a little mark of gunfire.

But Jiang Yuan's confident look made Wan Quan feel unconfident.

This is Jiang Yuan, who was given to Ningtai Jiang Yuan by the entire Heshan Criminal Investigation Detachment, was a man whose name was engraved on an iron pot. He said "my suggestions". What else can Wanquan say? Do you think it is?

"What do we need to do?" Wan Quan changed his question.

"Let's narrow the scope first. Sit." Jiang Yuan greeted several people and began to ask: "Where do you think the crime scene is? Where is the approximately where the car was when the murder was done?"

"This... I think it's either on the road or just got off the boat. If you haven't boarded the boat abroad, you don't have to send the car here." Wan Quan said for a moment, stopped again, glanced at Jiang Yuan a little embarrassedly, and said, "Of course, my reasoning may not be complete. If they kill people abroad and then send the car here, it may be a solution. In fact, if it's a stolen car, the possibility is even greater."

"Where do you get off the boat? Where do you get off the boat from abroad?"

"As for this batch of cars, as we understand, they should have been disembarked at Tianjin Port and transported from Hong Kong." Wan Quan prepared a little and gave an accurate answer.

It is not difficult to collect this kind of information by customs anti-smuggling. Speaking of which, the smuggling routes are all clear cards, similar to drug routes. Common car smuggling can be summarized as border land infiltration + coastal port entrainment + cross-border gray customs clearance. Land transportation from Myanmar to Laos to Yunguang, sea transportation is to travel to Fangchenggang, or Hong Kong and Macao, and a small number of people traveled across the ice from Russia.

Most smuggling gangs follow the established old route and fight with the police. If anyone wants to invent a new route, they can immediately expand into large smuggling gangs.

For the police, the route is clear, which does not mean that the prohibited goods can be accurately found.

The key to the problem is that finding goods may not necessarily lead to people, and finding small minions may not necessarily lead to large minions. The more levels the easier it is to disconnect. Smuggling groups can treat maids as consumables, and stay safely abroad, organizing waves of personnel to do things.

It is also for this reason that both drug cases and smuggling cases like to investigate and catch them all in one go.

"I think we can do a simple set of screening first." Jiang Yuan is becoming more and more skillful in doing this kind of small investigation now, because the skills he has mastered are so suitable for these.

Wan Quan nodded quickly and took a pen to record it: "You said."

Jiang Yuan: "First, considering the location, we can collect records of corpses from Tianjin Port and Hong Kong and Macau to see if there are any corpses who were shot and died in comparison."

Jiang Yuan: "Secondly, there is a bit of information when someone dies within the smuggling group, or it is not a true death. It's just that someone has disappeared or disappeared and no longer appears. If the information can be summarized, you can also make a list."

Wanquan recorded it, but was puzzled and said, "I don't understand it. Don't be upset. It is easy for smuggling groups to deal with the corpse. If they push it into the deep sea, it is easy to find it. If we look for the corpse, we may return without success. Furthermore, even if the body is found or the news of someone missing, this case will be difficult to solve."

"The discussion can be done at will." Jiang Yuan said first, and then said: "The two points I mentioned are actually to confirm the identity of the deceased. When we do criminal cases, we will have a focus after confirming the identity of the deceased."

"Grab the handle." Wan Quan seemed to understand.

Jiang Yuan nodded with a smile and continued, "If the corpse cannot be found, it's fine, but if it's someone killed near the sea or at the port, the corpse may remain. In fact, the most likely thing is to kill people when boarding and disembarking, because they died in smuggling cars, right?"

"That's right." Wan Quan quickly cooperated.

"Secondly, if the body cannot be found, searching for news of someone missing is also for confirming the news and narrowing the scope. The person in the smuggling group is also a human being after all. I think if there is a list of missing persons and we should confirm the identity of the missing person as much as possible, then have we found a member of the smuggling group? I think it is very likely that he is an important member."

Wan Quan was stunned when he heard the last sentence: "Why is an important member?"

"If it doesn't matter, it's not worth shooting." Jiang Yuan said half-jokingly: "In short, if you find someone first, solve the murder case and smuggling case, let's talk about it as the process of the case."

Wan Quanwei nodded. He understood that Jiang Yuan was just working on the murder case and was not very interested in smuggling cases.

Despite this, Wan Quan is still in a proper manner because he has been investigating this case for a long time and has never had any results. It would be better to see if Ningtai Jiang Yuan is as true as the legend.

"The bloodstain itself is our most important evidence." Jiang Yuan adjusted his sitting position at this time and said, "I suggest sending the bloodstain to the ministries for Y chromosome and family testing."

The Y chromosome is only found in men, and it is inherited from the paternal lineage. In other words, the Y chromosome of the father is the same as the Y chromosome of the son, as well as the Y chromosome of the grandfather and even the great master, and is also the same as the brothers and cousins.

Therefore, the benefit of comparing the Y chromosome is that it does not require the suspect's DNA to be in the library. As long as the DNA of any male member in his family is in the library, it can be compared. Although it cannot be confirmed which person is in the family member, the scope has been greatly narrowed. The famous Baiyin case was found from the 1980s to the 1910s, and finally one of the murderers' cousins ​​committed the crime, comparing the Y chromosome and then locked.

Family detection refers to genetic genealogy technology, which is a second-generation sequencing technology, and it also needs to be combined with big data, which is more difficult, but it can find women and cousins ​​of the third and fourth cousins. In ancient times, the orphans of the Zhao family cannot escape.

Wanquan usually does smuggling cases, so naturally he doesn’t need to do DNA testing. He has never dealt with laboratories related to ministries and commissions. He said a little embarrassedly: “Do you send it directly to ministries and commissions? This, our channel may be slower..."

Jiang Yuan waved his hand and said, "I'll make a call later. Y chromosome and family testing are still necessary. I heard that many smuggling along the coast are family-style, so as long as you win the comparison, it will be easier to sift it up."
Chapter completed!