Roseanna was last seen in St. Cloud Minnesota on August 14, 1998. She was accompanied by a friend, April Geyer, at the time. Neither Geyer nor Roseanna have been heard from again.

There was little word on what may have happened to Geyer and Roseanna until an informant came forward after their disappearance. The individual told authorities that Geyer and Roseanna attended a party in St. Cloud, Minnesota during the evening of August 14. Geyer and Roseanna may have attempted to hitchhike home after the party. The man stated that his friend strangled both women shortly thereafter at his apartment in St. Paul, Minnesota. The informant claimed that he assisted their attacker with the women's burials. The individual also stated that Geyer and Roseanna were buried near farmland in Wadena County, Minnesota near the Leaf River. A search of the area produced no evidence as to their whereabouts. Investigators do not know if the informant was providing accurate information and his story has never been confirmed.

Authorities initially believed that Geyer and Roseanna left their homes of their own accord, as they had a history of disappearing together for extended periods of time, and Roseanna's friends stated she had been planning to run away to California. Their loved ones said that both girls normally phoned their relatives shortly after each incident. Roseanna completed a program for juvenile offenders shortly before disappearing in the summer of 1998; she had been assigned to the program due to truancy from school. Their families believe the girls met with foul play.