Robert Ridley was 33 when his nude body was found near a guardrail along the Pyramid Lake highway north of Sparks, Nevada, on September 18, 1978. He was identified as Native American. The Washoe County Sheriff’s Office opened a homicide investigation after the discovery.

Despite the original inquiry, the case went cold and no suspects or arrests were publicly identified. The Sheriff’s Office continues to classify Ridley’s death as an unsolved homicide and is asking for information that could help explain why he was left exposed on that desolate stretch of highway.

If anyone knew Robert Ridley, saw something on or around September 18, 1978, or has information about activity on the Pyramid Lake highway that day, please contact the Washoe County Sheriff’s Office.