Griffin is kidnapped after investigating a lead based on his hunch as to the killer's identity and receiving a phone call from the killer disguising his voice and posing as one of Griffin's jilted blind dates. In the killer's basement, he is submerged up to his neck in a vat of water with his mouth taped shut; the death trap introduces into the water a concentration of sulfuric acid. After the killer leaves the room, Griffin uses his dying moments to blink a message in morse code, giving the FBI the lead he was following up on.