Mission Man Charged in Federal Officer Assault Case

Donovan Siers, a 51-year-old man from Mission, South Dakota, is facing federal charges after being indicted for assaulting, opposing, resisting, and impeding a federal officer in a violent Fourth of July incident. Siers, also known as Donovan Fast Dog, was hit with the charge following an alleged physical confrontation with a law enforcement officer employed by the Rosebud Sioux Tribe.

The indictment, handed down on September 13, 2016, stems from events that allegedly occurred on July 4, 2016, when Siers forcibly assaulted, resisted, opposed, impeded, intimidated, and interfered with the officer. According to the U.S. Attorney’s Office, the incident involved direct physical contact, escalating what could have been a routine encounter into a federal crime.

Siers appeared before U.S. Magistrate Judge Mark A. Moreno on February 7, 2016—prior to the indictment date listed in court records—and entered a plea of not guilty. The discrepancy in dates has raised questions, but federal authorities stand by the integrity of the charging process. Siers remains presumed innocent until proven guilty in a court of law.

If convicted, Siers faces up to 8 years in federal prison and a fine of $250,000. Additional penalties include 3 years of supervised release, a $100 payment to the Federal Crime Victims Fund, and possible restitution. The severity of the sentence reflects the federal government’s zero-tolerance stance on attacks against law enforcement personnel.

The investigation was led by the Rosebud Sioux Tribe Law Enforcement Services, underscoring the complex jurisdictional landscape of crimes committed on tribal lands involving federal authority. Assistant U.S. Attorney Kirk W. Albertson is prosecuting the case, representing the U.S. Attorney’s Office for the District of South Dakota.

Siers has been remanded into the custody of the U.S. Marshals Service pending trial. No trial date has yet been scheduled. The case continues to unfold in a federal system where violence against officers is met with swift and relentless pursuit of justice.

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