The murderer's reason for tearing off the button was simple.

If the police detect fluorescent paint on the buttons.

Then his identity as the murderer will be exposed.

But this button also gave the police an opportunity to solve the case.

According to the killer, the police still don't know why the button was torn off.

In fact, the police already knew the reason.

This time, the murderer was unaware that the police already knew, and thought the police were unaware.

The police could make some progress around this button.

For example, as Kouyu and Conan mentioned, they set up a "trap".

An investigation could be launched targeting buttons.

This investigation must be deliberately made known to the murderer.

The murderer can simply ignore it.

But once he started worrying that the button would be found by the police, he only had one option left.

Wash the buttons and put them in a corner of the apartment.

Even if the police find the button, they will most likely assume it was accidentally torn off.

The likelihood of it being specifically taken for testing is very low.

To put it bluntly, he was gambling.

Dou Guangyou didn't notice him tugging at the button.

They're betting the police won't inspect the buttons.

Even though this plan has many flaws and loopholes.

If you calm down and think things through, you can avoid falling into this trap.

But how many people can maintain such a calm and clear mind after committing murder?

Most murderers can be described as being extremely nervous and easily frightened.

Once the police get close to the most crucial evidence.

Even if someone appears calm on the surface, they will start to worry inside.

Not everyone can remain calm in this situation.

In other words, Kouyu and Conan are also gambling.

The murderer will be worried.

I'm betting the murderer will clear his name.

...

The plan has been finalized.

The next step is to execute the plan and set up the "trap".

It's also quite simple to implement.

All it takes is a little acting skill to guide the murderer.

...

After they dispersed, Inspector Megure looked at the three of them with a serious expression and said:

"Gentlemen, you may need to come back to the Metropolitan Police Department with us first."

"We just noticed that one of Mr. Furumura's buttons is missing."

"We believe this button is the key to solving the case."

"It was probably torn off when the murderer and Mr. Furumura were arguing."

"It's also possible that the killer is still on board."

"So we hope everyone will cooperate."

"Come with us to the Metropolitan Police Department to make a statement and conduct an inspection."

"We'll put in a good word with the developing lab; it won't affect your work."

Then, Inspector Megure said to Wataru Takagi:

"Brother Takagi, could you please lead the officers to search the apartment, the film studio, and the surrounding area?"

"Focus on inspecting places where items can be hidden, such as bushes and trash cans."

"Yes!" Takagi Wataru responded loudly, then turned and left the apartment.

It looks like they went to search.

His confident response made the murderer present feel uneasy.

This slight unease is like a seed.

After Inspector Megure uttered those words, they had already taken deep root in the killer's heart.

Meanwhile, the seed called "unease" had already sprouted.

At this moment, the murderer was very panicked.

But at this moment, he could only pretend to be calm.

Like the other two, he expressed his understanding of the police:

"No problem, as long as we can catch the culprit who attacked the ancient village."

...

Seeing his calm demeanor, Guangyou's lips curled up slightly.

Conan, who had been observing Yoshihiko Negami, also breathed a slight sigh of relief:

"It seems the 'prey' has taken the bait."

After suppressing his smile, Kwangyu said with great confidence:

"Of course."

"I never thought this plan would fail."

"The human heart is sometimes complicated, but sometimes it is also very simple."

"To make someone uneasy, start with their weaknesses."

"And we can't be too direct; we have to take it slowly."

After hearing these words, Conan couldn't help but sigh:

"Luckily you're on our side."

"Otherwise, it would really be a headache."

"An enemy who knows how to manipulate people's hearts is troublesome to think about."

How do you know I'm not an undercover agent?

Conan was taken aback by the words that suddenly came out of Mitsuyu's mouth.

After realizing what he meant, he shook his head and said:

"Forget it."

I still believe in you.

These words warmed Guangyou's heart.

But outwardly, he shook his head and sighed regretfully:

"I wasn't fooled."

"I still want to tease you a little more."

Conan, unaware of this, curled his lip:

"You're just a bit of a tease...".

"The rest are fine."

What he actually wanted to say was that Guangyou is usually very annoying and deserves a beating.

But after considering the difference in their fighting abilities, he decided against it.

"Feel free to rant..."

At this point, Guangyou deliberately paused for a few seconds.

Conan, thinking that Kousuke had finished speaking, asked:

"real?"

"Feel free to rant?"

It wasn't until Conan asked these questions that Kousuke continued with the second half of his sentence:

"As long as you can beat me."

"..." Conan pouted and ignored Kousuke.

...

After obtaining the consent of the three, Inspector Megure led the officers and Mitsuyu and the others out of the apartment.

Each of the three suspects was accompanied by a police officer.

This is to prevent the suspect from suddenly escaping.

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