A South Dakota sheriff’s deputy has died days after being shot while on duty in Sioux Falls, authorities announced Monday. Deputy Katherine Frank, 26, died surrounded by family and loved ones after spending several days hospitalized in critical condition.

The Minnehaha County Sheriff’s Office said Frank became an organ donor in her final act of service, allowing her to continue helping others after her death.

“In her final act of service and generosity, she became an organ donor, continuing to help others even in her passing,” the sheriff’s office said.

Frank joined the department in June 2024 after working at the South Dakota State Penitentiary, where she had been employed since September 2022. The sheriff’s office remembered her as a dedicated public servant whose loss would be deeply felt by colleagues.

“She served the citizens of Minnehaha County with professionalism, humility, and dedication,” the department said. “Her absence will be felt deeply by all who have had the privilege of working alongside her.”

The shooting occurred Friday evening in the 2900 block of South Keyrell Drive in Sioux Falls. Deputies were dispatched at approximately 7 p.m. and arrived around 7:32 p.m. Gunfire broke out roughly 30 minutes later.

Frank and the suspect, 39-year-old Sioux Falls resident Brandon John Oetken, were both struck by gunfire. Both received medical aid at the scene before being transported to hospitals.

Oetken faces three counts of attempted first-degree murder of a law enforcement officer and three counts of aggravated assault on a law enforcement officer.

The South Dakota Division of Criminal Investigation is leading the investigation. The state attorney general is expected to release a summary of the findings within 30 days.

A memorial honoring Frank has been established at the Law Enforcement Center, located at 320 West Fourth Street in Sioux Falls. The sheriff’s office said information about funeral arrangements and official honors would be announced at a later date.