Telling the victim he loves him, and then killing him proves the narrator is insane. “I loved the old man. He had never wronged me. He had never given me insult.” As a rule, you don’t tell someone you love them, and then murder him.
Taking the victims life for an eye also proves that the narrator is insane. “I think it was his eye!—yes, it was this!” “He had the eye of a vulture—a pale blue eye, with a film over it.” As a rule, one does not murder someone for an eye that looks creepy.
Stalking the victim also proves that the narrator is insane. “I had got my head in, und{{and}} was about to open the lantern, when my thumb slipped upon the tin fastening, and the old man sprang up in bed, crying out---“Who’s there?”” As a rule, he murderer does not stalk its victim by watching him while he is asleep.
Smiling when he was murdering his victim proves that the narrator is insane. “In an instant I dragged him to the floor and pulled the heavy bed over him. I then sat upon him the bed and smiled gaily to find the deed so far done.” As a rule, one does not smile while sitting upon him.
Chopping off the man’s head and limbs is another way the narrator proves he is insane. “First of all I dismembered the corpse. I cut off the head and the arms and the legs.” “I killed him.” As a rule, Chopping the head and limbs off shows a sign of insanity.
Sitting where he buried the body also proves that the narrator is insane. “I brought chairs into the room, and desired them here to rest from their fatigues; while I myself, in the wild audacity of my perfect triumph, placed my own seat upon the very spot beneath which reposed the corpse of the victim.” As a rule, you don’t bring chairs out and place them on top of where you buried the victim and