he gave himself the nickname of psycho. >> so the fbi, interview thomas hymer. who claims that he's a serial killer? maybe we can solve other cases here. >> he had the age progression clipping from usa today, and that's how he identified alissa turney. >> thomas hymer tells detectives that he was traveling across the country and that when he stopped in phoenix at a biker bar, he met alissa turney. he said at the time, she was a junkie, the two of them start a sexual relationship. and that he says at one point they're in a motel room, they're having violent sex, and that he kills her during the act. so he says he chops up her body, and then he takes the parts and disposes of them in a recycling plant. >> there was some evidence that maybe thomas hymer was being genuine. some of the things that he said weren't things that were nationally known, like her shoes, some jewelry, stuff like that. >> the fbi handed over that information over to the phoenix police department, and two detectives were assigned from the missing persons division. they were detective stuart so