Lisa Noel Sledge was 28 when she disappeared from the Marysville area and the Tulalip Indian Reservation in Washington in the winter of 1997. Family last heard from her around her birthday on December 8. Sledge was with her boyfriend, Erick Mattison, four-wheeling on the reservation when their pickup became stuck in mud; Mattison says she walked off to find help after an argument and never returned. The truck was reported stolen and was recovered in early January 1998, abandoned and partially stripped in a different remote area of the reservation.

Her family reported her missing on December 12, concerned because she left two young children, one with Down Syndrome. Marysville Police have treated the case as a suspicious missing person investigation. Over the years detectives followed many leads and community rumors, including a persistent theory that she died of an accidental drug overdose and that others concealed her body, but no conclusive evidence has been found and her whereabouts remain unknown. Does anyone have information about Lisa’s movements in December 1997 or who was with her that night?