You are the same killer as him, who just likes to set traps in people's houses and even in your house there are traps that only you know about.

And he's your rival, he doesn't want to cooperate with you, so he decided to attack you. He set a trap in your house, but when he sets that trap, he fell into yours. He hung upside down with a dissatisfied sigh, waiting for you to help him out..