While Conan was thinking, he saw Xiaolan watching the police officers put the masks away again with a complicated expression, seeming a little scared.

"What's wrong? Sister Xiaolan?"

Seeing this, Conan asked doubtfully, and Xiaolan smiled sheepishly when she heard Conan's question.

"No, it's nothing, Conan. I just saw the stacked masks and remembered the story Mr. Fangzheng told before..."

“Ah, that story…………Ah!”

Hearing Xiaolan's answer, Conan nodded, and then he suddenly had an idea!

Looking at those masks again, combined with the story Fang Zheng told before, Conan said... I know the truth!!

After that, Conan also quickly announced his reasoning through Mouri Kogoro, pointing out that the murderer was rock singer Aikawa Touya. And the secret room crime method he used was also solved by Conan. Simply put, it was Aimokawa Touya.

First tie the elastic band to the bottom of the dagger, then put the masks through the elastic band one by one, send them through the fence to Su Fanghongzi's bedroom, and then pull them up hard.

Under the action of the elastic band, the masks scattered on the ground will be pulled up and form a solid support point. Then, as long as the mask is pushed on the other side of the vent, the dagger at the top can be thrust forward.

You can easily kill Su Fang Hongzi.

Next, you only need to cut off the elastic band and recycle it, and a perfect secret room is formed.

Since Su Fanghongzi had already taken sleeping pills and fell asleep, no matter how hard she stabbed her, there would be no reaction. Otherwise, if one person threw so many masks through the vent, the possibility of not being discovered at all would be basically zero.

So you see, there is so much to learn.

Looking at the "mask arm" being pulled up, Fang Zheng was also speechless.

If this were put in reality, you would at least be able to tie knots like this, right? But on Conan's side, it seems to be "lubricant as silk", with more than two hundred masks strung on elastic bands, and it's still not at all

The rules are scattered on the ground. If you pull hard, what if one of them gets stuck?

As a result, not one of them got stuck...

is it possible?

Scientific?

Forget it, it's pointless for you to talk about science with Conan.

Let’s talk about Ke Xue.

All in all, the case was solved. After Conan exposed the lie of Aikawa Touya's alibi, he also decisively revealed his motive for the crime - as expected, as Fang Zheng thought, it was Aikawa Touya's wife twenty years ago.

The mother took the blame for Su Fanghongzi and then committed suicide. After learning the truth of the incident, Aikawa Touya planned to take revenge.

So, young man, you are on a narrow road. Why don’t you come to Hell Communication to vent? If I had taken action, I wouldn’t have ended up like this...

Looking at Touya Aikawa being taken away by the police car, Fang Zheng was filled with emotion, and not far behind him, Conan also looked at Fang Zheng with complicated eyes.

To be honest, Conan could find that today's reasoning was too smooth. First of all, Fang Zheng directly ruled out the suspicion of everyone in the West Hall. Out of Fang Zheng's trust, Conan immediately narrowed the target range. If the prisoner was really there

As for the East Building, it must be Mr. Aikawa and Miss Shimogasa besides the three of them, so Conan focused on observing the two of them, and sure enough, he saw clues from Aikawa Touye's alibi.

As for the technique used by the prisoner, Conan immediately thought of it after listening to Xiaolan telling her about the story. This is also true from the fact that two hundred masks are stacked on top of each other, which is the same as the hundreds of skulls in the story.

It really feels like being together...

But, is this all a coincidence?

Conan felt that something was wrong. After all, the story that Fang Zheng told before was very consistent with this crime method. It felt as if he knew that the prisoner would use this method to commit murder this time, so he deliberately made up a story to tell them in advance.

But this is too unreasonable, making it seem as if Founder can predict the future.

"...Hello, Brother Fangzheng."

Just when Conan made up his mind and wanted to ask, he saw Fang Zheng turn his head, glance at him, and sighed helplessly.

"Look, what I said is right. Every time I meet you outside, someone will die. Fortunately, one of them died this time."

"……………………"
Chapter completed!