Kiriko Kirikiri Kyouko figured out such details clearly. Maybe this black challenge is coming to an end.

"What, what, what straw sandals! Are you going too far to regard me as a murderer because of such an inexplicable thing? And you want to avoid it psychologically. The shoes are too small to wear. Are you really sure? You

Dare you say that this is definitely the case?”

"Not absolutely. That's why I asked the police for help and set this trap for you. If no one comes here, then I can only admit that I failed."

"I just said I came here to look for earrings..."

"This is a lie. You came here to destroy the traces left by the agency." Kirigiri pointed directly at Du Ruo.

"At that time, you were outside the secret room and used the mechanism arranged in the backyard to kill Mr. Baizhou inside. And the traces of this murder method are left on the icicles of the waterwheel."

Du Ruo gritted his teeth and was speechless.

"What kind of technique was it? Wasn't Miss Du Ruo with us in the corridor at that time? Could it be that she used the remote control to control the armored warrior?"

"It's a pity!" Du Ruo suddenly became excited after hearing this, "When we entered the room, the armor was empty. Haven't you already made sure that there are no strange devices inside?"

"You don't need something as advanced as a remote control." Kirigiri said without a hint of saltiness, "Just use the threads, waterwheels and Japanese swords that have been around since ancient times."

"Waterwheel? The immovable waterwheel can also be used now?"

"I'll explain it in order. First, prepare a thread. Although it is a thread, it is best to be a strong metal wire. Thread this thread on the Japanese sword that will be used as the murder weapon."

"Usually, in addition to the hole in the middle where the blade is embedded, a knife also has a hole called a 'cabinet' on the left and right. These two holes have many uses, and sometimes the left and right may have different uses. Anyway, you just need to know,

These two holes are just suitable for threading wires."

After the police inspected the actual object, they discovered that the Japanese sword used as the murder weapon did indeed have two cabinet holes.

"Then what? After listening to your explanation, everyone here has learned how to thread the thread on the Japanese sword, but so what?"

"One end of the metal wire worn on the knife is tied to a heavy object. The heavier the weight, the better, but it would be better if it can float on water. From this point of view, what can be thought of is wood such as firewood or logs.

.”

Wuyue Yujie looked around and found that he should be able to find a lot of wood that met the requirements, or it would be just right to cut a piece of bamboo for use.

"The other end of the wire just needs to be wound into a circle, and the preparation is complete."

"...What a wonderful murder weapon."

None of the people present could figure out how to use this.

"First, thread the loop at one end of the metal wire through the icicle hanging on the waterwheel. The icicle should not be too fragile, and it cannot be formed recently, but it should be very strong and gradually become thicker over the whole winter.

The kind that won’t break even if you knock it a few times.”

"what's next?"

"The next thing you need is probably a little skill. First, open the double door facing the backyard. The rubber band has been set up on the inside of this door. After opening the door, put the jack in the crack of the door to prevent it from letting go.
Chapter completed!