In Conan, people have a brain option system

The posture of using a computer is somewhat similar to the posture of driving a car. Both are the kind of postures that you can understand what the deceased was doing before he died as long as you see them.

For example, when driving, at least one arm will be raised to hold the steering wheel.

When using a computer, the arms will be slightly extended forward while sitting.

After observing the layout and furnishings in Kunio Koizumi's room, Conan and Masumi Sera guessed that he wanted to cover up the posture by dismembering the body.

"Mr. Koizumi, you dismembered your friend in the bathroom, right?"

"Then you tried to use alcohol to cover up the smell in the bathroom."

Facing Masumi Sera's inquiries, Kunio Koizumi always responded with silence.

"Mr. Koizumi, even if you don't say it, the police from the forensic department will still be able to confirm your suspicion after they confirm that the DNA of the blood in the bathroom in your room is consistent with that of the deceased."

"Besides, as the owner of Koizumi'an, it would be easy for you to get the knives used for dismemberment, right?"

Inspector Okamura, a police officer from Kanagawa Prefecture, said to Kunio Koizumi with a serious face.

Everyone thought that Kunio Koizumi would continue to resist.

But no one expected that after hearing what Inspector Okamura said, he directly admitted his crime:

"Yes, I killed Kawasaki."

"This bastard treated my place as a free resort. I drank last night and got angrier and angrier, so I just killed him!"

Inspector Okamura was overjoyed when he heard this.

Although the police from the forensic department did a luminol blood test in Kunio Koizumi's bathroom, the results showed that there was a large area of ​​blood in Kunio Koizumi's bathroom.

But the police have not yet found direct evidence of Kunio Koizumi's murder, and the murder weapon has not been found.

Kunio Koizumi's confession of the crime at this moment saved them a lot of trouble.

Just as Inspector Okamura took out the handcuffs to handcuff Kunio Koizumi and was about to take him back to the police station, he suddenly heard Conan's anxious voice:

"No, Officer Okamura, Mr. Koizumi is lying!"

Inspector Okamura looked at Conan with a confused look on his face, revealing a strong distrust of Conan, a primary school student.

That expression seemed to say:

What do you know, little brat?

However, Sera Masumi's words immediately forced him to face up to this matter.

"Officer Okamura, Conan is right, Mr. Koizumi is indeed lying."

"The motive he described is very different from the real situation."

A few minutes ago, Sera Masumi had already determined that Koizumi Koizumi wanted to cover up the deceased's posture of using a computer by dismembering the body.

And Koizumi's pale face after hearing Sera Masumi's description also proved that Sera Masumi's guess was correct.

But in Koizumi's confession just now, it had nothing to do with computers.

"Excuse me, Officer Okamura, can you ask the forensic police to collect fingerprints on the computer?"

"I think that if we just believe Mr. Koizumi's confession, the truth of the matter will be buried."

Before Inspector Okamura could answer, Koizumi Kunio suddenly became excited after hearing what Sera Masumi said.

He began to shout at Inspector Okamura:

"I'm not lying, officer, don't listen to 'him'!"

"This is the truth of the matter!"

Inspector Okamura originally thought that it was a bit redundant to continue the on-site investigation when the suspect had already confessed.

Wouldn't it be solved by asking Koizumi Kunio to confess where the murder weapon was?

But Koizumi Kunio's sudden abnormal reaction made him realize that something was wrong.

'Could it be that this guy is really hiding something? '

Inspector Okamura thought to himself, and then sent the forensic police to collect fingerprints on the computer keyboard.

At the same time, he sent police to confirm the identity of the deceased.

The police continued their investigation as if Kunio Koizumi had not confessed at all.

After a while.

The police from the forensic department collected fingerprints from multiple people on the computer keyboard.

After comparing the fingerprints with those of the deceased, the Metropolitan Police Department also confirmed that the deceased had indeed touched the computer.

Soon, the identity of the deceased was also confirmed.

The deceased was named Kawasaki Ryo, who was working as an algorithm engineer in a large IT company in Tokyo and was a highly skilled programmer.

Many staff members of Koizumi An said that Kawasaki Ryo often drank with their boss, and when Kawasaki Ryo came, he basically lived in Kunio Koizumi's room.

So far, the real situation was not much different from Kunio Koizumi's confession.

But when they were asked whether Kawasaki Ryo had a conflict with Kunio Koizumi, or whether Kunio Koizumi had ever shown impatience or complaints to Kawasaki Ryo, the answers the police received were surprisingly consistent-

Kawasaki Kawasaki and Ryo Kawasaki had a very good relationship, and they had never seen any friction between the two.

After the police in Kanagawa Prefecture carefully checked the surveillance cameras, they found that Kawasaki Ryo had actually entered Koizumi-an a week ago.

He never showed up again.

Even for meals, Kawasaki Ryo never left the room.

It was Koizumi Kunio who sent someone to deliver the food to the room.

"Come to think of it, Mr. Kawasaki was a little bit off yesterday."

A staff member in charge of delivering meals said.

"When I delivered meals to Mr. Kawasaki yesterday at noon, I knocked on the door for a long time before Mr. Kawasaki came out to get the meals."

"And Mr. Kawasaki looked very anxious and looked very bad at the time."

"He looked a lot more haggard than before, and his dark circles were very heavy."

"Then when I delivered meals to him at six o'clock last night, there was no response from the room at all, so I had to take the meals back."

Sera Masumi listened to the staff's description and then asked:

"Mr. Kawasaki didn't have these symptoms the day before yesterday, right?"

"I don't know about the day before yesterday, because when I delivered meals a few days ago, it was always Mr. Koizumi who came out to get the meals."

"And yesterday, Mr. Koizumi was not at Koizumi-an for half a day to deal with the poisoning case, so I saw Mr. Kawasaki."

"Hmm..."

Sera Masumi fell into deep thought.

'This is very different from Koizumi Kunio's description. ’

‘According to him, Kawasaki Ryo is treating his place as a free vacation place. ’

‘But if Kawasaki Ryo is really here for vacation, would he stay in the room for a week? ’

‘And Kawasaki Ryo is clearly here for vacation, but he becomes more haggard after a week of vacation. ’

‘Besides, if Koizumi Kunio really hates Kawasaki Ryo, why would he stay in the room with him and bring him food every day? ’

Based on the description of the staff, Sera Masumi's suspicion is getting stronger.