"What is this?" The Henggou Police Department saw Lin Si pull out a silk thread from the computer, with an expression of disbelief on his face.

Lin Si looked at the thread in his hand and laughed, but he didn't smile. He explained: "The killer used this fishing line to bring the key back to the room from outside the door, and of course this little piece of scotch tape is essential. ”

Lin Si took out a piece of tape from the case, closed one end and unfolded it, and the closed end seemed to be tied with a thin wire. He took a closer look and found that there were fingerprints on the tape. So he reminded: "Forensic personnel can check this tape, there should be the murderer's fingerprints on it." ”

The Henggou Police Department immediately asked the forensic personnel to check, and at the same time he asked Lin Si: "You said that the murderer used the computer to send the key back to the room, what should I do?" Xiao Ai and Akemi also looked at Lin Si curiously.

Lin Si was squatting next to the chassis at the moment, he grabbed the line, looked up at the crowd at the scene, and explained: "One end of the fishing line is tied to the cooling fan of the CPU, and the other end is tied to the closed part of the tape, and the end of the tape is unfolded and the key is attached. The killer locked the door with a key outside the door, and then the CPU fan turned, the line became shorter and shorter, and the key returned to the room. ”

Lin Si got up and walked a few steps to the book where the key was found.

He added: "The book has a girdle on it, and the thread passes through the middle of the girdle and the cover. Thin threads and tape can easily pass through when the book is placed upright, but keys with plastic heads can't get through, so the book topples over and presses down on the key, and the thread and tape are removed. The thin wire continued to retract, changing direction around the table legs, and was eventually swept into the computer by the cooling fan. ”

The Henggou Police Department suddenly realized that this was the case, and the method that Lin Si said was just enough to explain the situation at the scene.

However, after hearing this, Xiao Ai found a loophole in it, and hurriedly spoke, "Wait, it seems a little wrong." ”

Seeing that everyone was looking at him, Xiao Ai explained: "Although the method you said can be established, but the murderer is standing outside the door and locking the door, so how can he turn on the computer in the study?" ”

"yes!" Akemi also realized that something was wrong, "Everyone is outside the door, how can I turn on the computer in the room?" If the computer is turned on from the beginning, the line has already been rolled into the host before he goes out, and he has no time to lock the door! ”

The Henggou Police Department also felt that it made sense when I thought about it.

But Lin Si still had that indifferent expression, "So, as long as he goes out, can't he just let the computer turn on automatically?" Not only can the computer be set to automatically shut down, but in fact, it can even be set to automatically turn on. ”

Lin Si planned to check the system settings of the computer, and in order to avoid the thin wire winding around the fan and causing the CPU to overheat and automatically shut down, Lin Si obtained the consent of the police to cut the thin wire that tied the fan blades. This time, the computer has not died since he turned it on, and the Henggou Police Department finally understood the reason why the computer crashed before.

After checking, Lin Si soon made a discovery, "I found it, the task plan is set up with timed start-up and timed shutdown." In fact, there are many ways to turn the computer on and off at a regular time, and it can also be set in the BIOS, but the killer used the task scheduling function. The boot time is 10:30 tonight, and the shutdown time is 10:35. ”

In fact, it doesn't take five minutes for the fan to finish the line at all, but just in case, the murderer specially left five minutes, because it takes some time for the computer to turn on itself. In particular, some people's computers take a long time to turn on.

In five minutes, as long as the computer is not particularly bad, it has basically entered the system smoothly.

"Ten thirty? In other words, is the person who comes at this time the murderer? The Yokozo Police Department looked at the three names on the notebook - Hiroshi Shirakura, Kazuhiro Hosoya, and Michio Morioka.

Who is the murderer? It's a pity that the professor didn't write about the time they were scheduled to meet......

Xiao Ai stared at Lin Si, her eyes were full of surprise, she hadn't realized that Lin Si was still a detective before.

……

Not long ago, the police called the three suspects, and they all said they would come right away. Now someone finally came, and the first one to arrive was Bai Cangyang, a young man in his twenties, who was a little handsome.

As soon as he came over, he caught Lin Si's attention, because Lin Si felt the breath of the Heart Curse Seal on him.

"It seems that the murderer is this person." Lin Si muttered to himself.

Since the contact with the human body is completely random when the fragments of the curse mark scatter, the parasitic parts of the spell mark are also random and completely irregular. Lin Si sensed through his chakra and determined that the spell was imprinted on Bai Cangyang's right arm. Then he observed it with the naked eye, confirming his perception - there was a black spot the size of a grain of rice on Bai Cangyang's arm.

If it was a complete Heart Spell Mark, a black heart pattern would be formed, but now the spell mark on Bai Cangyang's body was only a fragment, so it was only a small irregularly shaped black spot. Because it doesn't hurt or itch, he may not have noticed it himself, or he may have noticed it but didn't care at all.

Seeing that the professor was dead, Bai Cangyang looked very sad, and in the face of the police's questioning, he replied: "I am a former student of the professor, and I came to the professor tonight to get a photo of my student days." ”

"What photo?" Henggou asked.

Shirakura explains, "I'm a magazine model now, and because women's clothing has been particularly popular lately, the editor heard that I had participated in women's clothing events when I was a student, so he asked me to provide photos of women's clothing at that time. Since the photo of the event was taken by Professor Hirota, I came to see Professor Hirota. ”

"Did you get the picture?"

"No, I didn't even see the professor, because the door was locked, no one answered no matter how I shouted, I thought the professor might have gone out, so I turned around and went home...... I just didn't expect the professor to be ......"

"When did you come and when did you leave?"

"Sorry, I didn't pay attention to the ...... time"

When Bai Cang was talking to the police, Xiao Ai keenly noticed one thing - from the moment Bai Cang entered the house, he looked around the scene, intentionally or unintentionally, looking like he was looking for something.

Xiao Ai glanced sideways at Lin Si and found that Lin Si was also observing Bai Cang, and it was obvious that Lin Si had also noticed this.

……

Soon after, two other suspects arrived at the scene, and the police questioned them.

Just as he was questioning, Bai Cang, who had finished the questioning before, seemed to see something on the floor, and while everyone's attention was not here, he quickly squatted down and picked up the thing. But as soon as he stood up, his right hand was grabbed.

The person who caught him was none other than Lin Si.

"Mr. Shirakura, what are you doing?" Lin Si asked knowingly.

When everyone heard this, they all looked at it.

"Ahh I ......" Shirakura's heart tightened, but on the surface he was calm, "I just saw garbage on the ground, so I planned to pick it up and throw it in the trash can." ”

"Didn't anyone tell you that things at the crime scene couldn't be touched? Not even garbage. Lin Si seemed to be warning Bai Cang, but in fact, he was taking the opportunity of grabbing Bai Cang's right hand to absorb the spell mark.

For this process, Bai Cang didn't feel it at all, but for Lin Si, a large number of chakras poured into his body.