The theme of "The Tell-Tale Heart", a Gothic fiction story by Edgar Allan Poe is, don't commit a crime because, your guilty conscience could drive you insane. In paragraph 16, it shows an example of the noises he thought he heard from the heart and it just kept getting louder and louder and he couldn't take it so then he confessed to the police officer. That shows that your guilty conscience can drive you insane.
The old man is sitting on the couch while the guy just watches him.
The old man is sitting on the bed just thinking. And the guy that lives with him is waiting for him to fall asleep so he can do what he always wanted to do.
The old man had finally fallen asleep and the guy is ready to kill him and get rid of the eye.
The guy kills the old man while he is sleeping.
The cop knocks on the door curiously, just to make sure everything is okay.
The officer is inside the house and starts talking to the guy. But the guy thinks he hears the heartbeat pumping and getting louder and louder. The guy thinks the officer hears it too so then he confesses.