SIOUX FALLS, S.D. (Dakota News Now) – The suspect charged in the fatal shooting of Minnehaha County Sheriff’s Deputy Katherine Frank now faces first- and second-degree murder charges.
Brandon John Oetken(Sioux Falls Police Department)PREVIOUSLY: Attempted murder, aggravated assault charges filed in fatal shooting of sheriff’s deputy
39-year-old Brandon John Oetken is charged with premeditated first-degree murder of a law enforcement officer and depraved-mind second-degree murder of a law enforcement officer, according to updated court documents.
Oetken was previously charged with three counts of attempted first-degree murder and three counts of aggravated assault against a law enforcement officer. He now faces four additional aggravated assault charges.
Frank, 26, was shot Oct. 9 while responding to a mental health hold in Sioux Falls and died Oct. 12.
Copyright 2026 Dakota News Now. All rights reserved.