Jingwen took Dugu Xin to the mansion of Chang'an Mansion, and then began to prepare to command the capture of Jiang Changtian, the great thief of Jiangyang. He's done a lot of evil lately, so you can't be angry if you don't catch him. So, this time he had to be caught.

"Ladies and gentlemen, now we all know that Jiang Changtian is hiding in Chang'an City. But Chang'an City has a population of hundreds of thousands, as long as he hides, we really can't catch him so easily. Because, it is impossible for us to search Chang'an City from all over the world. The last so-called search was very inefficient, less time-consuming and laborious, and more time-consuming. If you really want to search Chang'an City, I'm afraid it will take more than two days. When the time came, the adults also ......, "The official did not speak."

The meaning of the official is very simple, although theoretically it is not impossible to search all the places. However, this consumes too much time and energy, and it is simply not something that ordinary people can afford. Therefore, searching the entire Chang'an City, this can be said to be a thing that outweighs the loss. Once two days have passed, it is to Jingwen be removed from his post and then go back to retire. It's pitiful, Jing Wen is only nineteen years old, and he is actually going to retire, how ridiculous is this. Therefore, the next time is tight and the task is heavy!

"Actually, we don't need to search the entire Chang'an City to catch the bandits. Actually, we just need to determine the approximate direction of his hiding, and that's fine. So, as long as we find the approximate direction of his hiding, then we can find him, right? Jingwen said.

"But it's easier said than done to find his hiding direction! Chang'an City is so big, I'm afraid it's impossible to find it at all. The official said.

Jingwen didn't say much, just asked the official to bring a map.

"You mark it, when Jiang Changtian committed the crime, where were the locations of the crime!" Jingwen said.

Soon, the official marked the location of Jiang Changtian's crime. It then serves as the basis for the subsequent decision of the case.

"Have you seen that some of Jiang Changtian's cases were done in the east of the city, and some were done in the west of the city. They happened to be at the junction of the defense areas of the left and right Wuhou guards, and the left and right Wuhou guards had a certain amount of prevarication or the idea of guarding the territory with each other. So, the search efficiency here is low. And he is also an old bandit, of course he knows that this kind of place of defense area handover is the easiest to be sloppy. When they see the smell of fish, they go together, but when it doesn't do good, they leave one after another and ignore it. Blame the other party. Therefore, they are also competing when searching, and it is inevitable that they will tear each other down. Next, we will mainly search at the junction of the left and right Wuhou defense areas. In this way, the search range is not much smaller. Jingwen said.

"Talented, that's right!" The official said.

Next, Jingwen said again: "Look at it, since we have determined a vertical line, that is the middle line of Chang'an City. Then we'll determine where he's hiding. We just need to mark the locations of those crimes. Then you can draw a rough circle. And in the center of the circle, this is where he is probably hiding. ”

"Oh? Why are adults so sure? The official asked.

"This is the reason for criminal psychology, and this theory is called the crime radius! The average criminal commits a crime, and he usually commits the crime in a place he is familiar with. First of all. It is necessary to consider a way out so that you can avoid being arrested. And he must be in the place where he stays for a long time, and he will also commit crimes nearby. Because he is familiar with the environment, he can run away as often as he wants. And you see, no. The distance between these crime locations is actually not very far. And you connect these several crime locations with a pen to make them an irregular shape. They are probably a circle. And the circular center is the place where the so-called criminals are most familiar. And the most familiar place is most likely the place where they hide. This is the so-called crime radius! If you search the area, you should find something! Jingwen said.

"Genius! How can something so simple come of it that we haven't thought of for so many years? The official exclaimed.

Jingwen's theory of criminal radius is actually the basic theory of some criminal investigations in later generations, which is used against those conventional criminals. And many film and television dramas have relevant content, and Jingwen is just learning and selling. And this Jiang Changtian, after all, is not one of those real secret agents, so it is inevitable that he will fall into the situation of criminal psychology. This criminal radius can be used by many criminal investigators, even after more than a thousand years. And the ancients, there was no such thing as a so-called radius of crime, and they didn't find it for a while. But now that Jing Wen has pierced this window paper, it turns out that it is really easy to find out where he is probably hiding.

"My lord, we will immediately notify the officials Qianniuwei and Wuhou Wei to search!" The official said.

"Alright! Go ahead! Jingwen said.

And Duguxin also said: "I'll go too!" I'm afraid this Jiang Changtian is a veteran for many years, and ordinary government soldiers are not opponents, so if I go, there should be no casualties. ”

This Jiang Changtian is a master, and ordinary sergeants and servants, I am afraid that if they are not opponents, they will cause unnecessary casualties. Therefore, with Duguxin's help, there should be no casualties.

About three hours later, the officer returned.

"Your Excellency, you are truly a god! That Jiang Changtian was indeed hiding in that city, and it was a little more to the south of the city. As a result, as soon as we went to search, we forced him out. But this Jiang Changtian is really fierce enough, thanks to Miss Dugu's help, otherwise I'm afraid we will all lose several brothers! The official said.

"Okay! Prepare to interrogate him! Jingwen said.

And in the palace, Li Shimin soon got the news.

"Caught the bandits so quickly?" Li Shimin also asked in disbelief.

In Li Shimin's eyes, this kind of bandit may be very difficult to catch them, and they have a lot of experience in counterreconnaissance, so they should not be caught so easily. But it's so easy to Luo Wang, it's not been a few days! Jingwen is so powerful?

"Your Majesty, that's what Lord Jingwen did......"

The eunuch told Li Shimin about Jingwen's theory of the radius of crime, and Jingwen was also a ripple when he heard it, because this was a topic involving psychology and could not be studied at all in this era.

And the eldest grandson Wuji next to him, but there was a glimmer of light in his eyes. (To be continued......)