Suppose the victim did not lie down, but stood...

The victim was standing still when the prisoner appeared and was trying to strangle his neck. However, if the prisoner strangled his neck like this, the pinch mark would not be upside down.

So if you want to make the pinch mark upside down——

[Huh? Upside down?]

A wonderful scene appeared in May Yujie's mind.

[Is the prisoner upside down?]

As long as the prisoner hangs from the ceiling and strangles the victim's neck, won't the pinch marks turn upside down?

The moment this scene flashed out, she suddenly remembered a kind of terrifying monster, which would suddenly appear from the ceiling and hang from it to scare people.

However, the ceiling was reinforced with cement. There were neither beams nor skylights that could be opened and closed for the hanged man to hide. It was bare, with no holes or gaps.

So where did the prisoners come from?

May Yuyue couldn't help but fall into deep thinking again. She knew clearly that this was Kirigiri guiding her in the direction of her thoughts and training her sensitivity in this area.

Naturally, she will not let down the purple girl's feelings.

But unfortunately, she still didn't think of the key points to connect everything.

"There are many types of secret rooms, but there are only two major types. Do you know what they are, Sister Yu?"

"Uh... those with spare keys and those without spare keys?"

"That's totally wrong." Kirigiri closed his eyes and shook his head. "The answer is, the type of crime is when the prisoner is in the room, and the type when the prisoner is not in the room."

"It's natural that the criminal was in the room when the crime was committed, but what does it mean that the criminal is not in the room...?"

"It is a crime that is carried out through some kind of remotely operated device or mechanism. For example, a knife will fall off as soon as the victim sits on a chair..."

"Another way is to use the gap in the secret room to kill the victim from the outside. Let me give you an example, such as putting poisonous snakes in through the vents."

"I see...there is no need for the prisoner to stay in the secret room and face it."

"That's what I mean."

Kirikiri nodded with satisfaction.

The girl with glasses thought she would continue to explain, but she didn't expect it to be over.

"That's what it means? Which one does it mean?"

"Don't you understand yet?"

"Uh, yes, yes."

"The secret room that seems to be impeccable at first glance actually has a gap somewhere, and you can use this to kill the victim from outside the secret room. That's what it means."

"Um."

"I'm talking about Sister Yu, I've said so much, you should understand, right?"

At this time, even the girl with a sparse expression couldn't help but feel a little bit resentful.

"Do not understand!"

May Yujie protested loudly.

"...In this case, we can only go and see it in person. There is no evidence for my reasoning yet. It is just an idea on paper. It will be faster for you to see the answer with your own eyes."

Kirigiri tucked her hair behind her ears and planned to leave the room.

"Wait, wait, where are you going?"

It was clear that there were still a lot of mysteries that had not yet been solved and she was about to leave.

Kirigiri didn't answer, but just left the room, walked along the corridor, and headed for the stairs.

But she soon stopped on the landing and looked up at the stairs leading upstairs.
Chapter completed!