Because it was difficult to prove the murder method, Gao Cheng set up a set for Jin Sen Longnan and asked Jin Sen to demonstrate it in person.

When the police found the factory to investigate, Kanamori Ryuo was already uneasy, and heard that unless there was another natural fire to end the investigation, Kanamori Ryuo was likely to use the laser again, but he would definitely not do it on the same day, that would be too deliberate.

It will also not take too long, and it is easy to change after a long time, probably within two or three days.

Gao Cheng didn't have the time and energy to wait for the rabbit, and the rest of the work was handed over to the police.

At night, Utsumi sat in a car with his colleagues and watched.

"Will this really work?" The colleague yawned and said, "It's been two days......"

"I guess so."

Utsumi wasn't sure if what Gao Cheng said was true, he just ran through the streets and alleys, and he understood everything, but it seemed that Gao Cheng was still very serious, not like a joke.

She was already planning to save money and pay the commission fee first......

"If you dare to make fun of your sister, your sister will let him taste what life is!"

"If it's true, that's amazing," his colleague said a little bit of the cardboard marked with the laser path, "Is anyone really able to deduce so many things just by looking at it?" Didn't you say he's just a little ghost detective and can't do anything? ”

"Uh......"

Utsumi froze for a moment, and looked at the location of the crime outside the car window with a stiff face: "He said that the processing plant has a machine that uses carbon dioxide laser to cut iron plates, and the red laser is harmless, but the location is preliminarily determined and there is a tuning machine, and the really deadly laser is invisible...... However, as soon as you see the red line, you are sure that the prisoner will shoot. ”

"If we stay here like this, will the prisoners mess around?"

"Definitely, he just wants us to see the 'accidental fire' with our own eyes."

The more Utsumi spoke, the more sure he became, staring out the car window.

"You believe him very much now," the colleague also looked at the deserted street, "or ask an expert, I know a very good physicist, he is already an associate professor in his thirties, and he is also a classmate of his predecessors in the previous department......"

Utsumi's attention was all about finding the red line, and he said casually: "I won't talk about it if I don't have anything to gain today." ”

About a quarter of an hour later, when even the Utsumi couldn't help but feel sleepy, her colleague pushed her violently: "Hey! Inland Sea, isn't this the red line you are talking about? ”

"Huh?"

Utsumi rubbed his sore eyes and followed his colleague's pointing, and sure enough, there was a red line along the street pointing to the garbage heap in front of the crime site.

"Bang!" Before I could see it too clearly, the red line suddenly went out, and the garbage heap burned up.

"There it is!"

Utsumi didn't think much about it, and hurriedly got out of the car to look at the garbage heap that was surging with raging fire, and then turned to look in the direction where the red line had just shot.

As with Gao's schematic, the first corner mirror is fitted with a strange device, which appears to be a mirror used to change the path of the laser.

"It's true......"

Utsumi had the route of Gao Cheng's previous investigation in his mind, and he quickly ran to the metal processing factory, and after seeing the same mirror on the street lamp, he held his breath and sneaked into the factory.

Sakuragawa is not visible from the processing plant, and the prisoner can only be controlled remotely, and Gao Cheng tells her that if the prisoner causes an accidental fire, he will definitely take advantage of the chaos to clean up everything.

Utsumi tightened his palms and drew his pistol.

A ghost is a ghost, no matter how powerful her reasoning is, she still has to rely on her as a police officer to arrest her, and she can't be seen as a joke at a critical time.

……

Chenghu Detective Agency, when Gao Cheng was sorting out the information of the past case, Utsumi actually came over at night.

"Jin Sen has already admitted it."

Utsumi put a small paper bag in front of Gao Cheng: "Thank you this time." ”

"What is this?" Gao Cheng looked at the paper bag and wondered.

"Entrustment fee," a hint of pain flashed in Utsumi's eyes, "I can only make up 200,000 first, if it's not enough......"

"It doesn't take so much," Gao Cheng took out a 10,000 yuan bill and pushed the paper bag back to Neihai, "10,000 yuan as a hardship fee." ”

Utsumi slammed on the table, and his whole body leaned towards Gao Cheng, "Do you look down on my sister?!" ”

"Uh, no," Gao Cheng leaned back, wiped his sweat, and said with a dry smile, "I just don't have the habit of taking police commission fees, it's enough to mention my name in the report." ”

"That's right," Utsumi blushed and stepped back to change the subject, "but I still don't quite understand, why did you determine that the prisoner was Jinsen in the first place?" It's possible for other workers, right? ”

"Who do you think would rub a tatami mat out of a hole?" Gao Cheng asked rhetorically, "I talked to him when I saw that his house was closest to the crime site and was most affected, and he cared more about the police's investigation results than others, and he hoped that the police would close the case as soon as possible." ”

"But," Utsumi didn't have any doubts, but just spoke for Jin Sen, "I think he's quite pitiful, those bad people deliberately make noise every day, not only disturbing him recording, but also constantly disturbing the surrounding neighborhood, and he just wants to light garbage to scare away the bad ones, but accidentally ......"

"Garbage? Accidental? ”

Gao Cheng raised his eyebrows and crossed his fingers to look at the inland sea: "Controlling the laser path is quite troublesome, unlike the red laser, it is not easy for the super-energetic carbon dioxide laser to hit the target, a little factor will affect the angle of the optical axis, do you still think he is careless?" ”

"Huh?" Utsumi said confusedly, "It's just because it's not easy, it's a coincidence that the victim burns up?" ”

"Kanamori is an expert in metalworking and should know very well what happens when the laser used to cut iron hits the human body."

Gao Cheng shook his head and continued: "In order to be able to successfully ejaculate the human body, he has been preparing since a few months ago, and has failed at least 30 times, maybe more than 40 or 50 times, there are many holes left at the scene, but none of them lean on the garbage, that is to say, dozens of attempted murders, what kind of person would be so stubborn and cruel?" ”

"How so?"

"The prisoner stood by the window, looking at the target remote control laser, every time he failed, the tatami mat would leave a mark, until he stepped out of the deep pit and finally succeeded, he was a paranoid and cold-blooded guy, and he couldn't think he was a good person because he was a reading volunteer."

Gao Cheng handed a tape to Utsumi: "This is "Under the Wheel" he recorded after the killing, I borrowed it and listened to it, help me return it to him." ”

"So this is a planned killing that took months?" Utsumi didn't bother accusing Gao Cheng of taking the evidence without permission, and put away the tape with a trembling voice, and left the office a little absentmindedly.

Gray Yuan watched Utsumi go downstairs, stood at the door of the office and asked Gao Cheng, "If it's a male police officer, do you only charge 10,000?" ”

"How is that possible? Don't even think about ...... if it's less than 300,000," Gao Cheng sorted out the file, subconsciously replied, and only then did he notice the gray plain at the door.

"I'll collect the money later." Gray Yuan said lightly.

“……”

At the Kaizuka North Police Station, Utsumi drove all the way back, rushing to the interrogation room with his bag on his shoulder, his expression was terrifyingly silent, and Gao Cheng's words echoed in his head, and the peaceful voice of Kanamori reading aloud also echoed.

"Under the Wheels", which was recorded after the killing, sounded so peaceful and calm, as if people were bathed in autumn sunshine......

Rushed to the interrogation room, inside was also talking to Jinsen, and could hear Jinson's confession.

If Jinsen is found guilty of manslaughter, he will be sentenced to four or five years at most because of repentant homicide and good attitude, and planned homicide are completely different concepts.

"Smack!" Utsumi broke into the interrogation room and slammed it on the table.

"Do you still want to act?" Looking at Kanemori, who looked honest and repentant, Utsumi asked, "You were going to kill people in the first place, right?" Spent months killing people! ”

"No," Jin Sen raised his head and said urgently, "I really didn't expect it to be like that, I really regret it, I want to die......"

"Since you regret killing someone, how can you still read aloud in such a serene voice after killing someone?"

Utsumi took out the solo player and placed it in front of Kanamori, and as the tape turned, the sound of a gentle reading spread through the interrogation room.