Sioux County Sheriff Deputy Fired For Improper Actions

March 31, 2021 3:34pm

Sx Co Sheriff

On Saturday, March 20, at about 6:15 p.m., Sioux County deputy sheriff, Sgt. Nathan Kelderman was off duty and at his home in Boyden. Kelderman stated that a motorcycle drove past his residence on the city street, and that he thought he recognized the driver as a person who did not have a motorcycle license. He also believed the driver was a person who lived nearby his residence, so the deputy went to the suspected driver’s home on foot. Kelderman stated in his report and interview with command staff that the garage door of the suspect’s home was going down as he ran under it and into the garage. This caused the garage door to reverse and go back up. According to Kelderman, he was there to detain the suspect, but a physical altercation between him and the suspect, Nicholas Te Slaa started in the garage.


The altercation continued onto TeSlaa’s driveway, where a neighbor saw it and called 911; several Sioux County Sheriff’s deputies were dispatched. Te Slaa also made a 911 call. The son of the neighbor, who called 911, went over to the location of the altercation to break it up.


Kelderman stated that he went over to the suspect’s home without any identification, duty equipment, or method of communication. He was also in civilian attire, wearing a T-shirt, shorts and tennis shoes.


Three sheriff’s deputies arrived on scene shortly after the 911 calls. Te Slaa was ultimately arrested and charged with several criminal offenses.


The Sioux County Sheriff’s Office immediately began an investigation into Sgt. Kelderman’s actions. On Monday, March 22, the sheriff’s office received three other complaints from civilians concerning Kelderman’s actions.


After a complete investigation by the sheriff’s office it was determined Sgt. Kelderman had violated a sheriff’s office policy and training which prohibits an officer from this type of action when off duty. The initial incident involved very minor traffic offenses and should have been reported to an on duty deputy, per the sheriff’s office policy.


Sheriff Dan Altena stated, “Our policy is in place to prevent unnecessary danger or injury to officers, suspects, witnesses or others. The violation of it caused preventable injuries and put witnesses, neighbors as well as responding officers in a bad position.”


Subsequently, Sgt. Nathan Kelderman was terminated from his employment at the Sioux County Sheriff’s Office on Monday, March 29.