Cold Cases in South Dakota
ColdCaseIndex documents 3 cases in South Dakota, dated 1975 to 2019. 2 are recorded as unsolved. The earliest is Anna Mae Aquash (1975) and the most recent is Serenity June Dennard (2019).
- Unsolved 2 (67%)
- Solved or convicted 1 (33%)
Homicide clearance in South Dakota, 1965 to 2024
A homicide is "cleared" when police make an arrest or close it by exceptional means, so an uncleared case is not always an unsolved one. Source: Murder Accountability Project analysis of FBI Uniform Crime Report data, as published by Project: Cold Case. These are statewide totals and are separate from the ColdCaseIndex entries listed below.
By type
All South Dakota cases
Serenity June Dennard
Nine-year-old Serenity Dennard ran away from the Black Hills Children's Home near Rockerville, South Dakota, on the frigid morning of February 3, 2019, and was last seen walking north on Rockerville Road without a coat.
Rachel Lucille Cyriacks
Rachel Cyriacks, a 30-year-old mother of three from Woonsocket, South Dakota, vanished on November 13, 2013, after driving to Huron to pick up her estranged husband, Brad Cyriacks, who was being released from jail.
Anna Mae Aquash
Anna Mae Pictou Aquash, a 30-year-old Mi'kmaq activist in the American Indian Movement, was shot in mid-December 1975; her body was found near Wanblee on the Pine Ridge Reservation on February 24, 1976.