Berdella's corpse disposal method was so creative he might have gotten away with the murders, except for one thing. He kept detailed notes — a torture diary, illustrated with more than 350 Polaroid photographs of his victims. Entries were brief, clinical and in shorthand. "EK," for example, was Berdella's way of noting that he had subjected his victim to electro-shock with a 7,700-volt neon-sign transformer he kept in a bedroom. "CP" was his abbreviation for chlorpromazine, one of the drugs he used to control his hostages. Berdella owned and bred Chow Chow dogs and obtained sedatives usually used on animals through veterinary supply sources.