Minnehaha County Deputy Katherine Frank Dies After Being Shot While Responding to 911 Call Minnehaha County Deputy Katherine Frank, 26, died after being critically wounded in a shooting three days earlier while responding to a 911 call at a Sioux Falls home. Minnehaha County Deputy Katherine Frank, 26, died Oct. 12, 2026, after being critically wounded in a shooting three days earlier. She was killed in the line of duty while responding to a 911 call at a Sioux Falls home. Deputy Katherine Frank Honored for ServiceFrank became an organ donor in a final act of service after her death. The suspect, Brandon John Oetken, 39, of Sioux Falls, was charged with three counts of attempted first-degree murder of a law enforcement officer and three counts of aggravated assault on a law enforcement officer. Frank's death is a significant loss to the agency and the broader law enforcement community in and around Sioux Falls.Frank joined the Minnehaha County Sheriff's Office in June 2024, after working at the South Dakota State Penitentiary. She served with dignity and heart and her service made a meaningful difference. Her absence will be felt deeply by all who have had the privilege of working alongside her. The Minnehaha County Sheriff's Office said Frank's death is a significant loss to the agency and to the broader law enforcement community.Minnehaha County Sheriff Praises Late Deputy FrankFrank worked at the South Dakota State Penitentiary beginning in September 2022 before joining the sheriff's office in June 2024. Frank took the oath of office alongside another deputy during a swearing-in ceremony. In her final act of service, Frank became an organ donor, continuing to help others even after her death, the sheriff's office said. Frank's service made a meaningful difference, and her impact will remain with us always.