William Marshall Sisco, Jr., known to friends as Bill, disappeared from the Happy Valley area of Pima County, Arizona, on June 12, 1994. He was 32 when, after a disagreement while panning for gold with two companions, he left the group on foot and was never seen again. At the time he went missing he had two outstanding warrants, a fact one friend thought might explain a deliberate disappearance, but investigators have also considered accidental death in the desert and the possibility of foul play.

William is described as a white male, blond hair, hazel eyes, 6 feet 1 inch, about 165 pounds, with a tattoo on his upper right arm. He left behind a daughter and no confirmed contact has been made since he walked away. The case remains open with the Pima County Sheriff’s Department and the circumstances of his disappearance are unresolved.

Did anyone in the Happy Valley area know William or see him the night he left his friends?