civil forensic

Chapter 1157 Drawing a Circle

Chapter 1157 Drawing a Circle

Liu Jinghui followed Jiang Yuan's steps and measured the nearby route.

Yuan Bomin was busy collecting nearby surveillance, which was a meticulous job. In comparison, the cameras used by the police and the public were easy to obtain, but the surveillance cameras installed by some small shops themselves were very troublesome. Some simply used home surveillance cameras similar to Xiaomi, and their purpose might be just to check the cash register or their own goods. Not only was the management not strict, but the stored videos were also messy. These might need to be taken back and sorted out before they could be useful.

In fact, Yuan Bomin himself was not sure what the use of collecting these videos was.

However, since Jiang Yuan wanted it, he didn't hesitate.

It was normal that the video collection was useless. We couldn't let Jiang Yuan have nothing to use when he needed to check the video surveillance.

Yuan Bomin guessed that Jiang Yuan might want to check the suspect's means of transportation, so he specifically instructed: "Even if the drug dealers separate the people and the goods, there must be someone who puts the drugs at the transaction location. This person will most likely have to take a car, so the surveillance cameras near the lanes must be collected..."

"Yes." The subordinates gave him a little face.

Yuan Bomin said a few more words and emphasized: "Some surveillance cameras have been placed for a long time, and those who own them may have forgotten about them. You must remember to put them away. For example, in the security booth in the parking lot, the surveillance of the security booth is connected to the police system. Some bosses use the computer surveillance in the security room to watch themselves, and they must also be put away. There are also cameras near the road, such as the cameras in the elevator. You can't see them when the elevator is going up, but you can see them when it opens the door when it is coming down..."

"Got it, Captain Yuan." The team members began to dislike the captain's nagging and his tone was quite stiff.

Yuan Bomin said helplessly: "Don't think I'm being long-winded. The more weird the surveillance is, the more we wouldn't expect it to be, and the suspect wouldn't be likely to think of it. Maybe he'll show up, right?"

"Got it, Captain Yuan!" The subordinates' tone became even more blunt.

The guard next to him was bored and helped translate: "They probably really think you are too long-winded."

Yuan Bomin glanced at Wei Shixun and said, "Don't I know?"

The team members also glared at Wei Shijian: "Get out of here, kid. Even if Captain Yuan is really nagging, we can't say it."

"Okay, okay, I'm being long-winded." Wei Shijian walked away in a panic and returned to the crowd of criminal police detachments. He said helplessly, "It's really hard to deal with drug control people. I wanted to chat with them and brainstorm, but there's no fun at all. Do you have similar feelings?"

"Yes, Shixun." The detectives' tone made Wei Shixun feel familiar.

Liu Jinghui followed Jiang Yuan and walked several streets. He began to feel familiar. He couldn't help but say, "All these newly built roads are like this. They look almost the same. Let's look at them one by one. What do you want to see? Do you want to find a road that the suspect must have taken?"

"Of course it would be great if there is a necessary way." Jiang Yuan spread his hands.

Liu Jinghui smiled: "The roads here are well connected and they are all new roads. There are only a few roads with many people and there are no dead-end roads."

"I've been thinking about this as well." Jiang Yuan looked at both sides and said, "If you were a drug dealer, would you choose the road with fewer people or the road with more people when entering or leaving this place?"

This is a question of reasoning. Liu Jinghui was shocked, thought for a while, and said, "The advantage of choosing a road with many people is that it is easy to blend into the crowd. There is less surveillance here, and it is a suburban area annexed by the city. The crowd is complex and there are many floating populations. Choosing a route with many people is less likely to be discovered and has a high tolerance rate. The disadvantage is that once you are discovered, it is not easy to run. The roads with many people are converted from old roads. The road surface is not wide enough, and there are many electric vehicles and street vendors. Once you are unlucky and get stuck, you basically can't run away."

Zhongxin Road is a major road and also the main artery connecting Wujiaoge to the urban area. However, the situation on both sides of Zhongxin Road is more complicated. There are newly opened roads that are wide and straight with few people and cars. There are also old roads that have been rebuilt based on county roads or village roads, and the traffic conditions have taken a sharp turn for the worse.

Jiang Yuan smiled and said, "The error tolerance rate is high, but it's hard to escape if you make a mistake, so the error tolerance rate is reduced."

"It depends on how you think about it. The good and bad are just the opposite on less-traveled routes, with a low tolerance for error. For a period of time, he might be the only car on a road, and it would be easy to spot him with surveillance. But it's easy to run... However, given the environment in our country, it's actually very difficult to be spotted."

"Not necessarily. For drug dealers, if they prepare a safe house or an escape route, there is still a certain chance of escape." Jiang Yuan also has some experience in chasing fugitives. In short, it is very difficult to escape without preparation, but if you escape with preparation, directly leave the provincial border or even the national border, or stay in a safe house with food and drink for a long time, there is still a chance of escape.

But no matter which plan you choose, you need a lot of money to prepare. Needless to say, the travel expenses and the fees of the smugglers are not a small amount when fleeing abroad. Safe houses are even worse. In foreign countries, you can use a rented house as a safe house, but it is difficult in China. The landlord and neighbors will cause trouble at any time. It is best to buy a house yourself, prepare a large amount of supplies, and replace them from time to time. This requires a large area, and the total cost is not small.

Liu Jinghui's thinking was very direct. He shook his head and said, "If you want to consider that there are fewer people and it is easier to run away, then there is no need to meet here. Some transactions are done in the wilderness. Find a place with few trees and mountains. Standing on the top of the mountain, you can see if there is anyone following you. Trading on the top of the mountain is easy and clean."

"So you prefer the suspect to take the road where there are many people." Jiang Yuan asked.

"Yeah. I think the correct choice is the route with more people. Preventing being discovered is the most important thing. Another thing is that the suspect chose this place because he is familiar with it, or works and lives nearby." Liu Jinghui thought about it and said, "As we said before, it is not easy for drug dealers who make so much money to keep their money in the bank. They can't just dig holes and bury tens of millions of cash every day. There will always be expenses. There are still a lot of things to do in Lanyue City."

Jiang Yuan nodded slowly.

Liu Jinghui was afraid that Jiang Yuan didn't understand, so he whispered again: "Film and Television City."

"Money laundering?" Jiang Yuan understood a little.

Liu Jinghui sighed: "Liu Wenkai."

"Oh..." Jiang Yuan understood immediately.

"Of course, it could also be gambling or something." Liu Jinghui changed the subject: "Will this help catch someone?"

"No." Jiang Yuan spread his hands and said, "From this angle, Captain Yuan should have chased after us."

"He must have run away. You can ask again. Prostitution, gambling and drugs are inseparable. Drug lords also have to make a living." Liu Jinghui paused and asked, "Or list the time when Li Sige and Zhi Baoji made transactions, and then see who appeared nearby repeatedly during the corresponding time. This is a stupid method, right? Will it work?"

Jiang Yuan thought for a long time and said, "It's a bit too stupid."

Liu Jinghui didn't care that his opinion was rejected. He had been doing this for years. He just asked curiously, "How stupid is he?"

Jiang Yuan said: "First of all, the other party separates people from goods. This means that the person delivering the goods may be the person himself, or the postman, or even the postman may be different every time. If this is the case, this method cannot be used."

Jiang Yuan: "Secondly, even if there are fixed delivery personnel, the delivery time is not fixed. It may be half an hour or even ten minutes in advance, or it may be a day in advance. In this case, the range is too large."

Jiang Yuan: "The third point is also the scope, the scope of geographical factors. Their trading locations are not fixed, which means that we need to collect a lot of videos, watch videos of very long time and different locations..."

Thinking of the workload, Jiang Yuan couldn't help but shake his head.

"Okay. So, even if we pile up people, we still can't get it done?" Liu Jinghui asked.

"At least not in this pile."

"Where's Xu Taining?"

Jiang Yuan laughed: "You are making it too difficult for him..."

After a pause, Jiang Yuan thought about it a little uncertainly, and shook his head again: "There is too little information now, and the natural shortcomings are still not enough."

"What's your solution?"

"According to the theory of geographic profiling, draw a circle with the transaction location as the center. The intersection of the circles of multiple transactions is the suspect's residence or workplace..." Jiang Yuan first talked about the theory, and then said: "How about we put this theory into practice?"

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