Night after night the narrator watched the old man sleep plotting to kill him only if he sees the eye.
One night the old man awakes. The narrator sees the guys eye and smothers the old man with a cloth and hides him under the floorboards
The police arrive because a neighbor claimed they heard a scream. The narrator claimed it was him that screamed and that the man was away out of town.
Finally after talking with the police for awhile. The man claims to hear a ticking noise that keeps getting louder he claims it's the heart of the old man. He then confesses to the police that he killed the old man.