A family member holds a sign for Sahela Sangrait, a Lakota woman who federal prosecutors say was killed on the Ellsworth Air Force Base in Box Elder, South Dakota. Credit: Amelia Schafer, ICT Sahela “Toka Win” Sangrait, a 21-year-old member of the Cheyenne River Sioux Tribe, was reported missing from South Dakota in August 2024. Her remains were discovered near Hill City in March 2025, and investigators determined that she had been killed. U.S. Airman Quinterius Charles Chapp