"The Tell-Tale Heart"

In Edgar Alan Poe's "The Tell-Tale Heart" A man who already seems quite insane from the beginning kills the older man he lives with. The insane man justifies his killing by saying that the man's evil eye, an eye that look like a vulture, was making him go mad. At the end of the story the cops are called by a name who says that he or she has heard a suspicious squeal from the house the insane man and older man are in. When the cops arrive the insane man convinces the, at the beginning, that everything is okay and the squeal was him being startled awake, but when the man began to hear a heart beat coming up from the floor boards where he buried the old man. He tells the cops everything that happened.