Eagle Butte Man Sentenced to Federal Prison for Assault Resulting in Serious Bodily Injury

PIERRE - United States Attorney Ron Parsons announced today that U.S. District Judge Eric C. Schulte has sentenced a man from Eagle Butte, South Dakota, convicted of Assault Resulting in Serious Bodily Injury. The sentencing took place on July 13, 2026.

Trevin Antonio, age 29, was sentenced to three years and six months in federal prison, followed by three years of supervised release, and ordered to pay a $100 special assessment to the Federal Crime Victims Fund.

Antonio was indicted in October 2025. He pleaded guilty on April 9, 2026.

The conviction stems from Antonio assaulting a woman with a weapon in Eagle Butte, South Dakota, within the Cheyenne River Sioux Indian Reservation, on July 31, 2025. The victim suffered severe lacerations to her face that required hospitalization.

This matter was prosecuted by the U.S. Attorney's Office because the Major Crimes Act, a federal statute, mandates that certain violent crimes alleged to have occurred in Indian country be prosecuted in federal court as opposed to State court.

This case was investigated by the FBI and Cheyenne River Sioux Tribe Law Enforcement Services. Assistant U.S. Attorney Wayne Venhuizen prosecuted the case.

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