Bertolas was born in 1968. Bertolas, student and part-time hairdresser, disappeared from Wisconsin in 1988. The night of her disappearance she was last seen about 20.00 by her parents as she left her home, where she lived with her parents in Menomonee Falls, to meet her boyfriend in a bowling alley to confront him after learning he had given her a false last name and address and had another steady girlfriend. Her car was found on April 27, 1988 in the parking lot of the Red Carpet Lanes in West Allis, Wisconsin, but a search of it produced no hard evidence. Investigators believe she was murdered and that her killer is still on the loose. Her body has never been recovered. More than 20 sites, including parks, cemeteries and the suspect's family's vacation home, have been searched by bloodhounds, no trace has been found of Bertolas.