An Eagle Butte man convicted of sexual assault and sexual abuse has been sentenced to 20 years in prison by U.S. District Judge Roberto A. Lange.
Patrick Brown Thunder, 31, was convicted of sexual abuse of a minor and one count of sexual abuse of a person incapable of consenting.
The convictions stem from two separate incidents — one that occurred in April 2006 and the other in March 2008 — near Dupree. Both incidents involved Brown sexually assaulting females younger than 16.
The investigation was conducted by the Federal Bureau of Investigation and the Cheyenne River Sioux Tribe Law Enforcement Division.