In Conan, people have a brain option system

Akikawa Sosuke's "unintentional" words instantly awakened Conan and Sera Masumi, who were trapped in a dead end due to their refusal to cooperate.

In this case, the most confusing thing for the two detectives was the reason why Koizumi Kunio wanted to cover up the deceased Kawasaki Ryo's computer posture.

After all, Kosenan is a hot spring hotel for vacation.

Everyone's first reaction was that Kawasaki Ryo came here for vacation.

However, when they learned that this hot spring hotel was not only a hot spring, but also very popular among programmers,

then the nature of this was completely different.

"Mr. Kawasaki didn't come here for vacation at all."

"As a senior programmer of a large IT company, the reason why he didn't leave the house for so many days after coming to Kosen-an is that he must be working overtime to develop software!"

"The description of the staff who was responsible for delivering meals can also confirm that Kawasaki Ryo didn't get a good rest after coming to Kosen-an."

"There must be some reason that led to Mr. Kawasaki's death, and Mr. Koizumi didn't want Mr. Kawasaki's software development to be exposed, so he had to dismember Mr. Kawasaki while he was using the computer."

"After all, for ordinary people, they don't know the connection between this place and the programmers."

"So as long as the police don't know that Mr. Kawasaki was using a computer when he died, they naturally won't investigate the software he developed."

After figuring it out, Masumi Sera turned to look at Inspector Okamura beside him.

"Officer Okamura, can you investigate Mr. Koizumi's previous occupation?"

"I think that since this hotel is so popular among programmers, there must be other reasons besides the fact that the hot springs here can heal the body and mind."

"——The reason why programmers can gather here."

Inspector Okamura was about to give the order when he heard Koizumi Kunio slowly speak:

"No need to investigate. Before I ran the hot spring hotel, I was also a programmer."

This time, Koizumi Kunio's tone was no longer as firm as before, but full of despair.

He originally thought that after he dismembered Kawasaki Ryo, the police would not be able to link Kawasaki Ryo's death to the computer.

Unexpectedly, the high school detective so quickly determined that he was using dismemberment to cover up the posture of Kawasaki Ryo's death.

Koizumi Kunio wanted to stop the police from continuing to investigate by confessing.

Unfortunately, the artist Akikawa Sosuke, who suddenly appeared from nowhere, provided the most important information to the detective with a casual sentence.

When Kunio Koizumi heard Masumi Sera's reasoning, he knew he couldn't keep it secret any longer.

Because once the police department made Masumi Sera's reasoning public, everything would be over.

"So, could you please recount what happened yesterday in full?"

Inspector Okamura asked.

Kunio Koizumi nodded desperately and said:

"Yesterday I finished taking a statement at the police department, and after returning to Koizuman, I found that Kawasaki had been killed."

"Didn't you kill Mr. Kawasaki?!"

The police present all showed extremely surprised expressions after hearing what Kunio Koizumi said.

In their hearts, when the police from the forensic department confirmed that there was a lot of blood in Kunio Koizumi's bathroom, they had already equated him with the murderer.

"Who killed him? How did he die?"

Inspector Okamura asked.

"... Not sure."

After hesitating for a moment, Kunio Koizumi gave an ambiguous answer.

"But Kawasaki should have died from a knife wound on his neck."

"A knife wound on the neck? But I didn't see any knife wound on Mr. Kawasaki's neck."

A detective was confused.

"Because the wound was covered up by Mr. Koizumi's dismemberment."

Sera Masumi said.

The police officers present all showed a slightly horrified expression when they heard this.

Before Sera Masumi explained, they had never thought that there would be such a cruel method.

And Koizumi Kunio's description once again verified Akikawa Sosuke's conjecture.

From the beginning, when Akikawa Sosuke discovered that only the neck of the deceased was not cut from the movable joint, he guessed that the dismemberer might want to use the cut wound of the dismemberment to cover up the fatal wound of the real murderer who killed the deceased.

Assuming that the dagger was stabbed into the neck of the deceased in a horizontal state.

Then when dismembering the body, as long as the knife was cut at the position of the wound, the original wound would be covered by the larger "complete neck separation wound" wound.

Just like the operation that Takao Ohkawa used to cover the injection needle hole.

However, another police officer raised new doubts.

"No matter how serious the wound on the neck is, it won't kill him instantly, right? In this case, how could the deceased maintain the posture of using the computer?"

"If the stab is to an important blood vessel such as the carotid artery or jugular vein, then in extreme cases, death may occur within 1-2 minutes."

"Assuming that Mr. Kawasaki was stabbed in a fatal part, or if he had lost consciousness when he was stabbed, it is possible that he maintained the posture of using the computer."

Sera Masumi said, and also stole a glance at Akikawa Sosuke's neck at the door.

There is also a scar there.

That was the scar left by Akikawa Kyousuke who was stabbed by Kyouji Toda with the dagger that killed his mother in the car accident more than half a month ago.

If Akikawa Kyusuke's luck had been worse, he might have died by then.

Sera Masumi withdrew her gaze from Akikawa Kyusuke and continued to look at Koizumi Kunio.

"So, what exactly is the software you and Mr. Kawasaki developed? And why would you rather cut your friends into pieces than call the police?"

"Because...if the police know about this, my family will be in danger."

Kunio Koizumi once again made a surprising statement.

After being stunned for a moment, the police officer of Kanagawa Prefecture, Buokamura, suddenly said angrily:

"Were you threatened, Mr. Koizumi?"

"How can you not trust the police?"

Sera Masumi and Conan both looked at the Okamura Police Department speechlessly after hearing this.

This man was just about to arrest Kunio Koizumi as a criminal and take him to the police station a few minutes ago, but now he had the nerve to say this.

Kunio Koizumi turned around and glanced at the Okamura Police Department officer, and said coldly:

"If it weren't for this detective, would you be able to determine the truth?"

Okamura Police Department's face turned red when he made up his mind, and then he said awkwardly:

"Of course... of course! The most we can do is spend some more time. As long as we carefully check the surveillance video, we will definitely be able to catch you, Mr. Koizumi."

"But you would never know that Kawasaki was using a computer when he died."

After speaking, Kunio Koizumi sighed.

"In short, that's what happened. I was indeed the one who dismembered the body. I also destroyed the fatal wound on Kawasaki's neck. You can't get any evidence."

"Just think that I killed Kawasaki and take me to the police station."

"When the time comes to face the prosecutor and the judge, I will also say that I killed the person, and you should not continue to pursue the case."

"If the truth is exposed, my family will definitely not survive."