Diane Lynn Medicinehorse, a 26-year-old Native American woman known as Tiny, was last seen on September 28, 1981, in Crow Agency, Montana. That day she dropped her father off at her uncle’s home and then drove away in her white car; that was the last confirmed sighting. She was not reported missing immediately because she had a history of alcohol abuse and periodic absences, which family members initially treated as consistent with past behavior.

Concerns grew when she did not attend her mother’s funeral on October 23, 1981, and her sisters then reported her missing. Little is known about what happened after she drove away that September day. Her case remains unsolved and has been hampered by a lack of evidence and broader issues affecting missing Indigenous women. The Bureau of Indian Affairs and other agencies continue to investigate.

If anyone knew Diane’s routines, the white car she was driving, or has information about her whereabouts after September 28, 1981, please come forward.