PIERRE — This is an official press release from the U.S. Department of Justice (Federal Bureau of Investigation (FBI)), published as received.

PIERRE - United States Attorney Alison J. Ramsdell announced today that U.S. District Judge Eric C. Schulte has sentenced a man from Eagle Butte, South Dakota, who was convicted of Sexual Abuse of a Minor. The sentencing took place on August 4, 2025.

Dion Michael Brown, age 55, was sentenced to 10 years in federal prison, followed by five years of supervised release, and ordered to pay a $100 special assessment to the Federal Crime Victims Fund. Brown will also be required to register as a sex offender under the Sex Offender Registration and Notification Act.

Brown was indicted by a federal grand jury in October 2023. He pleaded guilty on April 21, 2025.

Between May 1, 2020, and October 2, 2022, Brown engaged in a sexual relationship with the victim while they were living in Eagle Butte, South Dakota, within the Cheyenne River Sioux Indian Reservation. During this period, Brown was between 50 and 52 years old, and the victim was between 13 and 15 years old.

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 brought as part of Project Safe Childhood, a nationwide initiative to combat the growing epidemic of child sexual exploitation and abuse, launched in 2006 by the Department of Justice. Led by the U.S. Attorneys’ Offices and DOJ’s Child Exploitation and Obscenity Section, Project Safe Childhood marshals federal, state, and local resources to locate, apprehend, and prosecute individuals who exploit children, as well as identify and rescue victims.  For more information about Project Safe Childhood, please visit https://www.justice.gov/psc.

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

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