Kannapolis, NC -- A woman believed by police to have been murdered by a New York serial killer grew up in North Carolina, and her ex-husband says he's shocked by her death.
Michael Wilhelm of Kannapolis says he was married to Amber Lynn Costello for about two years. They met in Wilmington, where Costello's family lived.
Wilhelm says he and Costello had a falling out because she used heroin. Despite that, Wilhelm says he's devastated to learn she may have been murdered by a serial killer.
Authorities in New York said Monday that Costello was one of four prostitutes whose bodies were found last month along a desolate beach on Long Island. Investigators suspect the women were slain by the same killer.