The famous criminal in the world of Conan

They saw a bottle!

The bottle is very small, probably only as big as a camera film box, and the body of the bottle is made of plastic.

The bottle cap is made of metal, and it is not a push-on type, but needs to be twisted and rotated to open. There is also a small "O"-shaped ring on the top of the bottle cap, which seems to be used to allow the bottle to be pierced on something.

At this point, the lid is screwed on and locked.

And the most important thing is that what Inspector Megure wanted everyone to look at was not the bottle, but the key inside the bottle!

Although the bottle is small, it could be smaller. Now, the food is safely placed inside the bottle.

"The door of this hotel is very unique. It cannot be locked by itself. In other words, the door can only be locked by holding a key or locking it from inside."

Inspector Megure said in a deep voice.

"So, this, is this......?"

Shiratori Renzaburo asked with a look of shock on his face.

"That's right,"

Inspector Megure confirmed their thoughts.

"This is the key to the door to President Murakami's room!"

Bai Masong raised his eyebrows.

"are you sure?"

"It won't be wrong,"

Inspector Megure explained,

"They have a very good sense of on-site protection. I came here and took out this key myself and tried it. It matches the door. This is the key to the room!"

"Besides this key and the one the manager has, is there no other spare key for this room?"

Bai Masong asked the manager directly.

If there are other spare keys, this room cannot constitute a secret room, so this is what Bai Masong should ask first.

"Ah, yes, our hotel rooms only have two keys."

The manager replied.

"Then, Manager, do you always carry your keys with you?"

asked Miwako Sato, saying that there was another possibility, that the manager's keys were stolen.

However, the manager shook his head.

"I've been carrying my keys with me all day."

"Is it possible that someone stole the key several days in advance, made a backup, and then put it back?"

Shiratori Jinzaburo then proposed a hypothesis.

But the manager shook his head again.

"That shouldn't be the case. These four guests just moved in today, so... "

Everyone understood what the manager meant.

Since the deceased moved in today, no one else knows which room he will live in.

"After all, our hotel has five or six suites of the same style."

After the manager finished speaking, everyone's idea of ​​having an extra key was completely put to rest.

But, since there was no extra key, how did the murderer lock the door after going out?

This question has now appeared in everyone's mind.

Bai Masong became interested, as this case was indeed a typical closed-room murder case.

Moreover, he looked around and his eyes focused on the bottle containing the key.

Just based on this, it is more complicated than the secret room where people are killed in the bathroom!

Thinking so, Bai Masong began his investigation.

The first thing he saw was the window. Besides the door, the window was also a common trick used in secret rooms.

This time, the living room has no windows, only the bedroom has a sliding window.

The window was large, extending from the floor to the ceiling, and coincidentally, it was in line with the bedroom door and the body lying on the floor.

However, although the window is very large, it is in the form of a lattice window, that is, it is composed of lattices, but each of its lattices is very small.

Bai Masong looked at the window, then looked at the key in the bottle on the ground, thinking about something.

"Don't look at it. The grid is smaller than the key. The key cannot pass through the grid window."

The short-haired woman seemed to see what Bai Masong was thinking and spoke first.

Bai Masong heard this and turned to look over.

The short-haired woman smiled at Bai Masong and said,

"I had already compared the manager's spare key to the window before the police arrived, and it didn't work."

Then she added,

"The manager's spare key is the same as the original key."

After listening to the short-haired woman's words, Bai Masong gave up thinking about the window and walked outside the living room door.

He lowered his head, leaned over, and looked under the door.

However, before looking at the door, Bai Masong first looked at the blankets around him.

The hotel floors were covered with blankets, with the blankets marking the boundaries between the rooms and the corridors.

The carpet in the corridor is higher, about seven centimeters, while the carpet in the room is very low, only about one centimeter high.

After looking at the blanket, Bai Masong looked under the door and found a small gap.

Bai Masong looked at the gap in front of him and thought of the plastic bottle in the bedroom.

He wanted to know if the plastic bottle could pass through the gap, so he immediately picked up the plastic bottle and gave it a try.

At this time, the short-haired girl called out to Bai Masong.

"No need to try. The bottles are sold at the hotel. I have already tried the same style of bottle before you came."

"It's difficult, almost impossible, to get the bottle in there."

Bai Masong's thinking was interrupted, so he could only think from another direction.

He thought about it and asked the short-haired woman again,

"Have you ever thought about putting the key from the outside into the bottle?"

The short-haired woman shrugged and said helplessly,

"I have thought about it. I have thought about this problem. I can put the key in the bottle and use something like silk thread to do it, but ....."

“But I couldn’t screw the cap back on.”

Bai Masong took over the woman's words.

"Indeed." said the short-haired woman.

Bai Masong turned to the door again, looked at the lock inside, and said lightly,

"The door lock inside the door also requires a key to lock."

The short-haired woman quickly followed Bai Masong's train of thought and said,

"So it's impossible to put the key in a plastic bottle and then lock the door with a thread or something like that."

"Yeah." Bai Masong nodded.

The two of them asked and answered each other, almost ignoring the other people present. Of course, the others could not keep up with their thinking.

For some reason, Miwako Sato looked at them with a strange feeling of jealousy. She asked the short-haired woman,

"Madam, I wonder if you are............"

The short-haired woman smiled and scratched her head embarrassedly.

"I forgot to introduce myself to the police officers. My name is Nanatsuki Koshimizu, and I'm from Fukuoka."