The narrator explains to his new cell mate in jail what he did to get in the prison. He starts to explain how he was caught and how he killed him.
The narrator gets the sharp feeling that he has to kill the old man as soon as possible.
The narrator slowly walked into the old man's room. The narrator watched the old man sleep for seven nights. On the eighth night when the narrator went to his room he went to quickly and knocked with his thumb and the old man screamed, "Who's there". The narrator kept quiet for a full hour.
The care taker finally killed the old man by suffocating him.
The care taker started to hear a loud heart beat and it won't go away.
The caregiver confessed to the police that he killed the old man.