Brosius was last seen in Valley View, Pennsylvania on January 21, 1977. He left Mace's Fountain Blue Motel with Kenneth H. Lenker and Richard Green, both Florida residents, and they were seen driving east on Route 209 He has never been heard from again. At Christmas in 1976, Brosius's parents got threatening phone calls. The caller demanding $500 because of Brosius's alleged role in a major marijuana deal, and threatened to cut off parts of Brosius's body and mail them to his parents if they didn't pay within an hour. Brosius's mother got $500 and tried to deliver it to the designated spot in Williamstown, Pennsylvania, but found no one there. His mother thinks he may have been abducted after he contacted the caller to straighten out the situation. Brosius's disappearance remains unsolved and foul play is suspected.