Barbara Ann Derry, 18, was last seen hitchhiking along State Highway 14 East from Vancouver, Washington on February 11, 1972. Her body was found March 29, 1972 at the bottom of a silo at the Grist Mill in Northern Clark County park. Identification was made through dental records.

Her body was partially disrobed, missing a bra, and covered with boards and debris. The cause of death was a single stab wound to the heart from a narrow-bladed instrument.

Investigators later linked the killing to Warren Leslie Forrest, a Vancouver-born man convicted in other Clark County murders and considered a prime suspect in multiple similar cases dating back to 1971. Forrest was sentenced to two life terms for murders in 1974 and remains incarcerated for those convictions.

If anyone knew Barbara, saw her hitchhiking that day, or has information about her movements in February 1972, please come forward.