On the last day of the investigation, the narrator accompanies the police into the cellar. They still find nothing significant. Then, completely confident in his own safety, the narrator comments on the sturdiness of the building and raps upon the wall he had built around his wife's body. A loud, inhuman wailing sound fills the room. The alarmed police tear down the wall and find the wife's corpse. Sitting on the corpse's rotting head, to the utter horror of the narrator, is the screeching black cat. The terrified narrator is immediately shattered completely by this reminder of his crime, which he had believed to be safe from discovery, and the appearance of the cat. As he words it: "I had walled the monster up within the tomb!"