Pem Michelle Yates-Briggs was 16 when she left her home in Oregon City, Oregon, in 1979 to travel to California intending to find her father. She was born March 31, 1963, and is described as white, blonde hair, brown eyes, 5 feet 3 inches to 5 feet 6 inches, 110 to 125 pounds, with a cleft chin and a crooked front tooth. The last known contact came June 1, 1979, when a California police department phoned her mother to ask whether Pem had permission to be in that state; her mother said she did. That call is the final confirmed indication of her location.

Pem was not reported missing until March 2024, 45 years after she was last heard from. The specific California police department that made the June 1 call is not identified, and it is not publicly known how she was traveling or what happened after that phone contact. The Clackamas County Sheriff’s Office is handling the active investigation now. If anyone knew Pem, saw her in 1979, or has information about where in California she might have been on or after June 1, 1979, contact the sheriff’s office.