Colleen Vanita Simpson was 14 when she disappeared from her home in Clearfield, Iowa, on the night of October 5, 1975. She was last seen at home while her father, a local law enforcement officer, was out on patrol; the family discovered she was missing the next morning. Reports differ on whether she left from the house or from an out-of-town event with family that night, and there is no definitive account of her movements after she was last seen.

A photograph resembling Colleen was later found in the possession of serial killer William Bradford. Her father at one point thought the woman in the photo could be Colleen but later withdrew that identification. No confirmed evidence has established what happened to her, and the disappearance remains unsolved. The family continues to hope for answers.

Anyone with information is asked to contact the Taylor County Sheriff’s Office.