Theresa Diane Walsh was 23 when her body was recovered as one of the victims in the Santa Rosa hitchhiker murders, a series of unsolved homicides in and around Santa Rosa, Sonoma County, California, between 1972 and 1973. Her remains were found in a rural location, a pattern shared by other victims who were often discovered nude in isolated spots near steep embankments or creek beds adjacent to roads.

The exact cause of Walsh’s death was difficult to determine because of the condition of the remains. Investigators have treated her case as part of the broader series: the victims were believed to have been hitchhiking when they disappeared, and authorities have considered various leads, including possible links to known offenders and theories about motive, but no definitive suspect has been identified and no arrests have been announced.

Anyone who knew Theresa, remembers her last movements, or has information about the Santa Rosa hitchhiker murders is asked to contact investigators.