The Tell-Tale Heart
"The Tell-Tale Heart" is an 1843 short story by Edgar Allan Poe. Detectives capture a man who admits to the killing of the old man with a strange eye. The murder is carefully planned, and the killer killed the old man's by pulling his bed on top of the man and hiding the body under the floor. The killer feels guilty about the murder, and the guilt makes him imagine that he can hear the dead man's heart still beating under the floor.