Tell Tale Heart

The tell tale heart is a story of a seemingly insane man (or woman) telling the story of how he or she murdered an old man.  I think that it is being told in court to a judge and jury, and the narrator is pleading for his or her sanity and reason for the murder.  The narrator is scared of "an evil eye"  that the old man posesses, and each night for a week plots to kill him.  Then he finally ups and does it.  But a neighbor hears the ruckuss and calls the police, who then arrive on the scene, to investigate.  When the police do arrive the narroator freaks out and gives himself away due to the alleged beating of the heart.  I think that the narrator is somewhat crazy, but overall sane, the beating of the heart could be the death watches, a type of beetle heard before in the walls, but murering someone because of an eye is a little crazy.