……

At this time, the three suspects had also arrived at the scene. They all talked one after another, not knowing whether it was true or false evidence, to prove that Professor Hirota was not killed by them.

"What they said is also right~~" Conan thought of what he had seen here after hearing their reason, "All entrances and exits to this room are sealed. ”

"If you really want to talk about the gap, it's only under the entrance door, this gap that allows the key to pass through."

"As long as you use a rubber band, the murderer took the key and locked the door from the outside after killing Professor Hirota, and it is indeed possible to use this method to get the only key to this door into the house."

"But it's too clever to have to scratch the key under the notebook. That's unlikely. ”

"The strange thing is that these books are a mess inside the house. On the line from the door to the phone, why is there only this notebook that has fallen? ”

"Why is there a blank space between every message on the answering machine, if you want to use this kind of thing to send to the bottom of the notebook............"

If Taiyi lets him do it, these things to solve the case can be said to be difficult for him. And now, when gin and vodka are about to strike, he needs to find a vantage point where he can use it to his advantage.

looked at Taiyi's busy figure for himself, and his sister's eyes that kept smiling and looking at him.

Shiho Miyano feels that his life in the past few days is his happiest days. With the company of relatives and sisters. There are also people who like themselves, Taiyi, who keeps spoiling himself.

Xiao Ai felt that it was inappropriate to lose his life for the sake of an irrelevant matter, although Taiyi and his sister were very supportive of themselves, but ............

"~~~ After the murderer locked the door, it was theoretically impossible to use what method to get the key to the center of the room, or even under the notebook."

Xiao Ai didn't care, and Conan's confused expression continued to say his opinion.

“…… Even if you were to use that, a cassette of an answering machine would not be possible. Although there are a lot of incomprehensible phone calls, even if the dead Professor Hirota is drunk. ”

"It's really like the officer of the ditch, as speculated, and fell along with that bookshelf, but if you were to say that you were shot in the back of the head, it's really unlikely."

"Besides, it's not only dangerous to stay here, it's also pointless."

"Because, you have been generalized."

Conan looked at Xiao Ai, the chess piece on the phone, and couldn't help but be stunned, he felt as if he had seen the truth of the matter.

On the other side, Xiao Wai obviously didn't notice what Conan was thinking at this time, but took Miyano Akemi's hand and said softly.

"Sister, we won't be involved in this matter, let's go."

"With Taiyi here, we will come home safely. Back to the home where you and I are together. ”

"Wait a minute~~~" Conan began to pretend again at this time. "Don't you want to know the truth about this case?"

Xiao Ai said a little indifferently, "Didn't I say it a long time ago? Anyway........."

"It's not an accident, it was he who killed ~~" Conan directly interrupted Xiao Ai's words, "The murderer is after killing Professor Hirota." Somehow was used to turn the house into a secret room so that his death looked like an accident. ”

"I'll let you know right away, what is the truth? It is absolutely impossible in this world, there is no case that cannot be solved. ”

……………

After Officer Henggou really couldn't confirm who the murderer was, the suspects were about to leave, and at this time Conan spoke in Taiyi's tone.

“……… I already know how the murderer created this secret room, and who the murderer is who has committed this kind of crime. ”

"What do you say............"

Although Officer Henggou has a very respectful attitude towards Taiyi, those suspects don't recognize who he is.

"Really, didn't I already say it just now, it's an accident no matter how you look at it!"

“…… It is because of this that laymen are unable to handle cases. ”

"You're talking like you're not a layman."

“……………”

Taiyi was too lazy to take care of the person in front of him, he just wanted Conan to quickly reason about this case, after all, there was gin and vodka outside, and they were eyeing it there.

“…… This room is indeed a secret room. No matter how you look at it, it will make people think it is an accident, but the murderer only needs to use the tape of the answering machine. ”

"And those chess pieces, you can easily make a very perfect secret room technique."

"The strap of the telephone?"

"Chess pieces?"

Seeing that everyone didn't believe it, Taiyi pretended to say that Conan came out to fiddle with the secret room's techniques.

Conan first pulled out a roll, and the tape in the telephone. First of all, pull the tape out of the tape to the appropriate length.

Then, I put this tape on the phone, but I still have to put these tapes outside.

Then, pull out the tapes, straighten them, and walk outside the door.

Then, put the circle on the top of the key and thread it through the tape. Leave the key outside the door again, take the rest of the tape, and go back to the room.

Put the three chess pieces of the same height into a triangle, and then put the extra tape on the flag closest to the phone. Then put the notebook on it.

"You are simply Hu Lai~~" Xiao Ai was very disdainful of Conan's methods, "I think you may want to use the power of pulling the bag to knock down the chess pieces, but unfortunately this is just a theory." ”

"After all, you have to know this, the base of the Western chess piece is very stable. If you do that, the key will hit the piece first and be pulled out of the notebook. ”

"What about the other way around?" Conan explained his reasoning directly, "I was about to turn the pieces upside down. ”

“……………”

Conan continued his gesture, "Although the head of the chess piece is round, as long as it is made of cardboard like the material of this notebook. It should be able to hold on stably. ”

The subsequent demonstration was exactly as Conan had speculated. As long as the answering machine continues to start, the tape will be completely rolled up.

The key was pressed under the book, and the evidence was completely gone.