Shannon Dunham, Assaulting a Federal Officer, South Dakota 2025

PIERRE, South Dakota - Shannon Dunham, a 38-year-old man from Mission, South Dakota, has been sentenced to federal prison for Assaulting, Resisting, and Impeding a Federal Officer.

According to a federal investigation, on October 2024, a Rosebud Sioux Tribe Law Enforcement Services officer was dispatched to a residence in Mission based on a report that Dunham was causing a disturbance.

Upon arrival at the residence, the officer contacted Dunham, who was verbally aggressive, grabbed the officer, and brandished a knife at him. Dunham was subsequently arrested.

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

U.S. District Judge Eric C. Schulte sentenced Dunham to 8 months in federal prison, followed by 3 years of supervised release, and ordered him to pay a $100 special assessment to the Federal Crime Victims Fund.

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

The incident occurred on the Rosebud Sioux Indian Reservation, which is located in Brule County, South Dakota.

The exact date of the sentencing was November 12, 2025.

Source: https://www.justice.gov/usao-sd/pr/mission-man-sentenced-federal-prison-assaulting-federal-officer