Chapter 1245

Wan Quan looked at Jiang Yuan, only feeling that he didn't understand but felt it was powerful.

As police officers, Wan Quan only needs simple thinking, and it is easy to draw a conclusion that it is very difficult to solve a case with just a pool of blood and a little gunshot residue.

But Jiang Yuan's confident appearance made Wan Quan unconfident.

This is Jiang Yuan, the Jiang Yuan of "All members of the Heshan City Criminal Investigation Detachment present to Ningtai Jiang Yuan", the man whose name is engraved on the iron pot stew. He said "My suggestion", what else could Wan Quan say? Say "I think"?

"What do we need to do?" Wan Quan changed the way of asking.

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

"This... I think it's either on the road, or just off the boat, because if you don't board the boat abroad, you don't have to send this car over." Wan Quan said, then stopped, looked at Jiang Yuan slightly awkwardly, and said: "Of course, my reasoning might not be complete. If they killed someone abroad and then sent the car over, it might also be a handling plan. Actually, if it's a stolen car, this possibility is even greater."

"Where did it get off the boat? Where did it board the boat abroad?"

"For this batch of cars, as far as we know, it should have been offloaded at Tianjin Port, transported from Hong Kong." Wan Quan prepared a little and gave an accurate answer.

Such information is not difficult for customs anti-smuggling to collect. Speaking of which, smuggling routes are all open cards, similar to drug routes. Common car smuggling can be summarized as border land infiltration + coastal port smuggling + cross-border gray customs clearance. Land transport enters Yun-Guang from Myanmar and Laos, sea transport is from Vietnam to Fangchenggang, or the whole line of Hong Kong and Macau, and a small amount enters from Russia across the ice.

Most smuggling groups are fighting with the police along established old routes. If anyone invents a new route, they can immediately expand into a large smuggling group.

And for the police, the route is clear, which does not mean that they can accurately find the contraband.

The key to the problem is that finding the goods does not necessarily mean finding the person, and finding the small fry does not necessarily mean finding the big fry. The more layers, the easier it is to break the line. Smuggling groups can completely treat the horse boys as consumables, while they safely stay abroad, organizing people to do things in waves.

It is also because of this reason that whether it is a drug case or a smuggling case, they like the practice of in-depth investigation and then catching them all in one net.

"I think we can do a simple screening first." Jiang Yuan is becoming more and more handy at this kind of small investigation, which is also because the technology he masters is too suitable for these.

Wan Quan nodded hurriedly, looking like he was holding a pen to record: "You say."

Jiang Yuan: "First, considering the location, we can collect records of corpses at Tianjin Port and Hong Kong and Macau areas to see if there are corpses that died of gunshot wounds for comparison."

Jiang Yuan: "Second, if someone dies within the smuggling group, there is always some information, or it is not certain news of death, but someone has gone missing, or disappeared, and no longer appears. If the information can be summarized, a list can also be made."

Wan Quan recorded it, but was greatly puzzled and said: "I don't quite understand. Don't be unhappy after I say it. It is very easy for smuggling groups to handle corpses. Pushing them into the deep sea makes them very easy to be lost. We looking for corpses is very likely to return empty-handed. Furthermore, even if we find the corpse or the news of someone missing, this case is also very difficult to solve."

"Discussion can be casual." Jiang Yuan said first, then said: "The two points I raised are actually to confirm the identity of the deceased. We who do criminal cases, once the identity of the deceased is confirmed, we have a point of effort."

"Grasp." Wan Quan seemed to understand but not understand.

Jiang Yuan nodded with a smile and continued: "If the corpse cannot be found, forget it, but if it is killed in the near sea or port, the corpse may be left behind. In fact, it is most likely to kill when getting on or off the boat, because it died in the smuggled car, right."

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

"Secondly, if the corpse cannot be found, looking for news of someone missing is also to confirm the news and narrow the scope. People in the smuggling group are people after all. I think if there is a list of missing persons, and we try our best to confirm the identity of the missing person, then have we found a member of the smuggling group? I think it is very likely to be an important member."

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

"If it's not important, it's not worth shooting with a gun." Jiang Yuan said jokingly: "In short, find the person first, solve the homicide case. As for the smuggling case, let's talk about it as the case progresses."

Wan Quan could only nod. He finally understood. Jiang Yuan was aiming at the homicide case, and had little interest in the smuggling case.

Despite this, Wan Quan was still well-behaved, because he had been investigating this case for a long time and had never had any results. It was better to see if Jiang Yuan of Ningtai was really as legendary as he was.

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

Only males have the Y-chromosome, and it is paternally inherited and does not change. In other words, the father's Y-chromosome is the same as the son's, as well as the grandfather's and even the high-grandfather's, and it is also the same as brothers and cousins.

Therefore, the benefit of comparing the Y-chromosome is that it does not require the suspect's own DNA in the database. As long as it matches the DNA of any male member of his family in the database, it can match. Although it cannot confirm which specific person in the family member it is, it has greatly narrowed the scope. The famous Bai Yin case was investigated from the 80s to the 10s. Finally, a cousin of the murderer committed a crime, matched the Y-chromosome, and was subsequently locked.

Family testing refers to genetic genealogy technology. This is second-generation sequencing technology, and it also needs to be combined with big data. The difficulty is higher, but it can find females, and it can find cousins of three or four generations. If it were placed in ancient times, the orphan of the Zhao family would not be able to run away at all.

Wan Quan usually does smuggling cases, so naturally he doesn't need to do DNA testing, and he hasn't dealt much with laboratories related to the ministry. He said a bit embarrassedly: "Send it directly to the ministry? This, our channel might be relatively slow...".

Jiang Yuan waved his hand and said: "I'll make a call in a while. Y-chromosome and family testing are still necessary. I heard that many smuggling along the coast are family-style. As long as it matches, it will be easy to screen."

"This is a good way." Wan Quan naturally agreed completely, and then listened to Jiang Yuan's continued arrangement. Vaguely, he even had the illusion that solving the case was easy.

(End of chapter)