Mission Man Sentenced for Assaulting a Federal Officer

PIERRE - United States Attorney Ron Parsons announced today that U.S. District Judge Eric C. Schulte has sentenced a Mission, South Dakota, man convicted of Assaulting, Resisting, and Impeding a Federal Officer. The sentencing took place on April 21, 2026.

Duane Rouillard, III, age 37, was sentenced to time served through April 22, 2026, equal to approximately three years and one month in custody, followed by three years of supervised release, and ordered to pay a $100 special assessment to the Federal Crime Victims Fund.

Rouillard was indicted by a federal grand jury in Feburary 2023. He pleaded guilty on February 19, 2026.

In December 2022, Rouillard was in custody at the Rosebud Sioux Tribe Adult Correctional Facility, in Todd County, South Dakota. On the evening of December 29, 2022, Rouillard assaulted a corrections officer by punching him multiples times in the head and face with a closed fist.

This case was investigated by the Rosebud Sioux Tribe Law Enforcement Services. Supervisory Assistant U.S. Attorney Kirk Albertson prosecuted the case.

Rouillard was immediately remanded to the custody of the U.S. Marshals Service.