Is there scene about this story in detective conan?
a bedroom with rope, chair, knife and tape recorder man.
He pad-lock from inside the room so no one can enter. Next day, a detective accepted report about the man, he went to it.
He can not open the door, kicked it and he finally opened also. He saw the man, bloody, dead, two hands tied behind the chair, in front of it the tape recorder had been played and full of blood. the detective died