Lead Woman Sentenced to Over Three Years in Federal Prison for Aggravated Assault in South Dakota

RAPID CITY, S.D. – Vivian Rose One Feather, 32, of Lead, South Dakota, was sentenced on October 30, 2026, to three years and five months in federal prison for Assault Resulting in Serious Bodily Injury. The sentencing was handed down by U.S. District Judge Karen E. Schreier. Following her prison term, One Feather will serve three years of supervised release and must pay a $100 special assessment to the Federal Crime Victims Fund.

One Feather was indicted by a federal grand jury in May 2026 and entered a guilty plea on August 7, 2026. The charges stem from an incident that occurred on February 14, 2026, near Little Eagle, South Dakota.

According to court records, One Feather and her boyfriend encountered a man walking alongside the road. Believing the man had wronged her boyfriend’s mother, they exited their vehicle and assaulted him. While the boyfriend used only his fists, One Feather struck the man with a metal bar and continued to kick him even after he fell to the ground. The assault ceased only when her boyfriend intervened and pulled her away.

The victim lost consciousness during the attack and suffered severe injuries requiring sutures and staples to his head. He also experienced dizziness for several months following the assault.

This case was prosecuted in federal court pursuant to the Major Crimes Act, which requires certain violent offenses occurring in Indian country to be handled federally rather than by state authorities.

The investigation was conducted by the Bureau of Indian Affairs – Office of Justice Services. Assistant U.S. Attorney Carl Thunem prosecuted the case on behalf of the U.S. Attorney’s Office.

Following sentencing, One Feather was remanded to the custody of the U.S. Marshals Service to begin serving her federal prison term.

This prosecution underscores the federal government’s commitment to enforcing violent crime statutes within Indian country, ensuring accountability and justice for victims.

United States Attorney Ron Parsons highlighted the importance of federal jurisdiction in such cases, noting the protections afforded under the Major Crimes Act.

Additional recent federal prosecutions in South Dakota include cases involving involuntary manslaughter and assaulting federal officers, reflecting ongoing enforcement efforts in the region.

Official reference: View the original document.