Because it's hard to prove the method of killing, Gao Cheng sets up a set for Jinsen Longnan to demonstrate it himself.

When the police found the factory for investigation, Kim Sen lung Nan was already upset. He also heard that unless there was another natural fire, the investigation could be ended. Kim Sen lung Nan would probably use the laser again, but he would not use it that day, which was too deliberate.

It won't be too long. It's easy to change after a long time. It will be in two or three days.

Gao Cheng didn't have the time and energy to wait, leaving the rest of the work to the police.

At night, neihai and his colleagues sat in a car watching.

"Is that really going to work?" My colleague yawned and said, "it's been two days..."

"I think so."

Neihai is not sure whether Gao Cheng is right or not. He just runs through the streets and understands everything. However, it seems that Gao Cheng is still serious and doesn't seem to be joking.

But she has planned to save money and put on the commission fee first

"If you dare to make fun of me, I'll tell him to taste life!"

"If it's true, it's too great," my colleague said, drawing a little spirit from the cardboard marked with the laser path. "Is it true that someone can look at it and infer so many things? Don't you say he's just a kid detective and can't do anything? "

"Er..."

"He said that the processing factory has a machine that uses carbon dioxide laser to cut iron plate. The red laser is harmless, but there is a preliminary location determination and a mode machine. The really lethal laser can't be seen... But as long as you see the red line, you can be sure that the prisoner will do it."

"If we stay here like this, will the prisoners come into trouble?"

"Certainly, he just wanted us to see the" accidental fire "with our own eyes."

The more neihai said, the more sure he was. He stared out of the window.

"You believe him now," my colleagues also looked at the deserted street, "or you'd better ask an expert. I know a very good physicist who has been an associate professor in his thirties and a classmate of the previous generation in the Department..."

Inland pay attention to all in looking for the red line, casual way: "today no harvest again."

About a quarter of an hour later, even when she was sleepy in the inland sea, her colleague gave her a big push: "Hello! Inland sea, is that the red line you're talking about? "

"Ah?"

Neihai rubbed his sour eyes and looked along the direction of his colleagues. Sure enough, there was a red line along the street pointing to the garbage dump in front of the crime scene.

"Bang!" Before I could see it clearly, the red line suddenly went out and the garbage pile was burning.

"There it is

Neihai, unable to think much, got out of the car to look at the burning garbage heap and turned back to look at the direction of the red line.

Like Gao Cheng's schematic diagram, a strange device is installed under the first corner mirror, which seems to be a mirror used to change the laser path.

"It's true..."

In his mind, neihai came up with the route of Gao Cheng's investigation. He quickly ran to the metal processing factory. After seeing the same mirror on the street lamp, he held his breath and sneaked into the factory.

Sakuragawa can't be seen from the processing plant. The prisoner can only be controlled remotely. Gao Cheng tells her that once the prisoner makes an accident fire, he will take advantage of the chaos and clean up everything.

Neihai tightened his grip and pulled out his pistol.

A kid is a kid. No matter how powerful the reasoning is, it still depends on her as a policeman to arrest her. At the critical moment, she can't be seen as a joke.

……

Chenghu detective office, Gao Cheng is sorting out the case data in the past, the inland sea actually came in the evening.

"Kinson has admitted it."

Neihai put a small paper package in front of Gao Cheng: "thank you this time."

"What is this?" Gao Cheng looks at the paper package and doubts.

"Commission fee," said neihai with a twinkle in his eyes, "I can only collect 200000 yuan first, if it's not enough..."

"I can't use so much," Gao Cheng said, drawing out a ten thousand yuan note and pushing the paper package back to inland waters. "Ten thousand yuan is regarded as hard work."

Neihai slammed on the table, leaning toward Gao Cheng, "do you look down on your sister?"

"Er, no," Gao Cheng said with a dry smile, leaning back and wiping his sweat, "I just don't have the habit of taking the police commission fee. It's enough to mention my name in the report."

"So what," said the old man, who was back in the sea. "But I still don't understand why you decided that the prisoner was Higginson. Is it possible for other workers? "

"Who do you think will rub tatami out of a hole?" Gao Cheng asked, "when he saw that his house was closest to the crime scene and was most affected, he specially talked with him. He was more concerned about the police investigation results than others, and hoped that the police would close the case earlier."

"But," neihai said for Kinson without any doubt, "I think he is very poor. Those bad guys make noise on purpose every day, which not only disturb his recording, but also disturb the neighborhood around him. Moreover, he just wants to light the garbage to scare away the bad guys, but he is not careful..."

"Some trash? Not careful? " Gao Cheng raised his eyebrows, crossed his fingers and looked at the inland sea: "controlling the laser path is quite troublesome. Unlike the red laser, it is not easy for the super powerful CO2 laser to hit the target. A little factor will affect the optical axis angle. Do you still think he is careless?"“ Why Neihai said vaguely, "it's just because it's not easy. It's a coincidence that the victim burns up?"“ Kinson is an expert in metal processing. He should know very well what happens when the laser used to cut iron blocks hits the human body. " Gao Cheng shook his head and continued: "in order to be able to successfully shoot into the human body, he began to prepare a few months ago. He failed at least 30 times, maybe more than 40 or 50 times. There were many holes left on the scene. That is to say, none of them relied on garbage, that is to say, dozens of attempted murders. What kind of people would be so stubborn and cruel?"“ How could it be? "“ The prisoner stands by the window and looks at the target's remote-controlled laser. Every time he fails, tatami will leave a mark. He won't succeed until he steps out of the pit. He is a paranoid and cold-blooded guy. He can't think he is a good man just because he is a volunteer reading aloud. " Gao Cheng handed a tape to neihai: "this is" under the wheel "recorded by him after killing people. I borrowed it and listened to it. Help me return it to him."“ In other words, it took several months to plan to kill people this time? " Ignoring the accusation that Gao Cheng took away the evidence without authorization, neihai collected the tape in a trembling voice and left the office absently. Huiyuan watched neihai go downstairs, standing at the door of the office, and asked Gao Cheng, "if it's a male police officer, do you only charge 10000?"“ How is that possible? Don't even think about less than 300000... "Gao Cheng sorts out the files, subconsciously answers, and only when he reacts can he notice the Huiyuan at the door“ I'll collect the money later. " Huiyuan said faintly At Beizhong North police station, neihai drove all the way back to the interrogation room, carrying a bag. He looked terrible and silent, and his mind echoed Gao Cheng's words, as well as the peaceful sound of Kinson's reading books. "Under the wheel", recorded after the murder, sounds so peaceful and peaceful, as if people were bathed in the autumn sun... When they arrived outside the interrogation room, their colleagues were still talking with Kinson, and they could hear Kinson's confession. If Kinson is found guilty of manslaughter, he will be sentenced to four or five years at most because of confessional homicide and good attitude, which is totally different from planned homicide“ Bang The inland sea broke into the interrogation room and pressed heavily on the table“ Do you want to play any more? " Looking at Kinson with an honest and repentant face, the hostage asked, "are you going to kill people in the first place? It took months to kill! "“ No, "Kinson raised his head and said in an urgent voice," I really didn't expect to be like that. I really regret it. I want to die... "" since I regret killing people, how can I read in such a peaceful voice after killing people? " Neihai takes out the player and puts it in front of Kinson. As the tape turns, the gentle sound of reading spreads in the interrogation room.