A 26-year-old South Dakota sheriff’s deputy has died after a Sioux Falls home confrontation left her critically wounded and a suspect facing multiple attempted-murder charges.
Fox News Digital reported that Minnehaha County Deputy Katherine Frank was critically wounded Friday night when gunfire erupted at a Sioux Falls home about 30 minutes after deputies arrived.
Frank spent three days in critical condition. She died Monday, Oct. 12, 2026, surrounded by family and loved ones. The suspect, 39-year-old Brandon John Oetken of Sioux Falls, was also wounded and remains locked up without bond.
The case is a hard reminder of what deputies face on ordinary calls. A young officer is gone. A suspect sits on serious charges. Investigators are still sorting out the force used that night.
Deputies went to the Sioux Falls home on Friday night. About 30 minutes later, the confrontation turned into gunfire.
Frank and Oetken were treated at the scene, then taken to hospitals. Frank’s wounds left her fighting for her life through the weekend. She did not recover.
The Minnehaha County Sheriff’s Office said she became an organ donor after her death. A memorial of flowers and photos later appeared at her patrol vehicle in Sioux Falls.
Oetken, 39, 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.
Jail records reviewed in the reporting also list a felony offense of disarming a law enforcement officer. He remained in custody without bond Tuesday morning.
It was not immediately clear whether prosecutors would add charges after Frank’s death. The Minnehaha County State’s Attorney’s Office was asked for more information on the shooting and the existing counts.
Frank was 26. She began work at the South Dakota State Penitentiary in September 2022. She joined the Minnehaha County Sheriff’s Office in June 2024.
Her time in uniform was brief. The cost was total. Colleagues described a deputy who showed up with professionalism and heart, then paid the highest price on a call that should never have ended this way.
The sheriff’s office put that loss in plain terms.
"Deputy Frank's death is a significant loss to our agency and to the broader law enforcement community in and around Sioux Falls,"
the office said. It added that she served Minnehaha County “with professionalism, humility, and dedication,” and that her absence would be felt by everyone who worked beside her.
In another statement, the office said, “Deputy Frank served with dignity and heart,” and that her service “made a meaningful difference” that would remain with the agency.
At the sheriff’s office’s request, the South Dakota Division of Criminal Investigation is handling the shooting probe. That handoff is standard when an officer is hit and force is used. It keeps the review outside the home agency.
South Dakota Attorney General Marty Jackley said investigators would examine the use of force during the encounter. A public report is expected within 30 days.
Jackley’s office also said the shooting was the fifth involving law enforcement officers in South Dakota this year. Five officer-involved shootings in one year is not a statistic a quiet state should shrug off.
After Frank’s death, Jackley issued a tribute of his own.
"We mourn the loss of Minnehaha County Sheriff's Deputy Katherine Frank, who sacrificed everything in the line of duty to keep us safe. Let us never forget her courage and the service of all of our law enforcement officers. Deputy Frank and her family remain in our prayers,"
he said.
Major questions remain. The public still does not have a full account of why deputies were called to the home, how many were on scene, who fired, what weapons were used, or how both Frank and Oetken were wounded. Those answers belong in the DCI file and in Jackley’s forthcoming report, not in rumor.
What is already clear is the outcome that matters most. A deputy who left the penitentiary for the sheriff’s office is dead. The man charged in the confrontation is in jail without bond on attempted murder and aggravated assault counts against law enforcement. South Dakota owes Frank’s family a complete investigation and a straight public accounting of the force used that night.
When a 26-year-old deputy dies on a house call, the least a state can do is tell the truth, finish the case, and remember who took the risk while everyone else slept.
