Although the front end of the metal tape measure could be hooked onto Mr. Morokuchi's ring and the key could be delivered to the room through the window, thinking this way would indeed ignore a dozen prerequisites.

After all, if you use a tape measure, you need to put your key chain inside in advance, and then you won’t be able to lock the door when you go out.”

After all, this is different from a rubber band that goes directly through a ring. The metal tape measure uses the front end to clamp the ring, and the tape measure box at the back cannot fit the ring at all.

This inherently limits the possibility of taking the key out, locking the door, and then putting the key back in.

In addition, the air vent is four meters away from the bed, and the tape measure cannot be extended that far and will bend directly.

"What about Dejima? He doesn't have anything except a tape recorder..." Anabuki was about to open his mouth to refute, but his words stopped abruptly in the middle.

Her pupils contracted violently, and she turned her head to look at Dejima with a look of disbelief on her face. Tarumi beside her also reacted immediately and showed the same expression.

Looking at his friend who had been constantly proving his innocence and now seemed to have realized something, Dejima showed a bitter smile on his face.

His reaction seemed to have confirmed this.

"It seems you've all realized it." Tang Ze looked at the two people who seemed a little bit unconvinced and said, "Yes, it was the cassette tape that accomplished this trick.

This prop is perfect for the crime scene.

Just pull out the tape inside and you can pass the thin tape through the ring.

Then just place the front end of the tape and the recording tape outside the air vent, and the technique is complete.

Unlike rubber bands that have knots, magnetic tapes are smooth while maintaining a certain degree of flexibility.

And it is not like a tape measure that can only be hung on a ring with a single line.

This also made it possible to close the door with a key after poisoning Mr. Zhukou. He then only had to pass the key through the front end of the tape outside, through the hole for the door key, and finally lift the tape to form a slope.

In this way, the key will move into the hands of the deceased due to gravity and the smooth surface of the tape.

After that, it's just a matter of rewinding the tape to remove it from the keyhole and the ring."