PIERRE, (KCCR) — A Fort Thompson woman was sentenced to federal prison for an assault that lead to a death in Buffalo County. U-S Attorney Ron Parsons says U-S District Judge Eric Schulte sentenced 30 year-old Rosilee Grey Owl to five years in prison for Assault Resulting in Serious Bodily Injury. Grey Owl was also ordered to serve three years of supervised release after the prison term. Grey Owl was indicted by a federal grand jury in November of 2025. She pleaded guilty to the charge in July of this year. Parsons says Grey Owl got in an argument with a male victim on September 2nd of 2025 at the victim’s home in Fort Thompson. Grey Owl became angry and swung a shovel toward the victim, striking the man in the head and causing a severe cut to the back of the man head. The victim was tended to by ambulance personnel but declined additional help and returned to his room. He was found dead, the next day. Grey Owl was taken by the U-S Marshals Service to begin serving his sentence.
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