Source: Office of United States Attorneys
RAPID CITY – United States Attorney Alison J. Ramsdell announced today that U.S. District Judge Karen E. Schreier has sentenced a Rapid City, South Dakota, man convicted of Voluntary Manslaughter. The sentencing took place on June 6, 2025.
Vincent Boesem, age 32, was sentenced to ten years and one month in federal prison, followed by three years of supervised release, and ordered to pay a $100 special assessment to the Federal Crime Victims Fund.
A federal grand jury indicted Boesem in March 2023. He pleaded guilty on March 14, 2025.
Between July 3, 2022, and July 4, 2022, Boesem and his elderly uncle had been drinking together at the uncle’s home within the Pine Ridge Reservation. While intoxicated with alcohol and methamphetamine, Boesem became enraged and beat the victim about his head, face, and body. Although Boesem ultimately called 911 to get medical help, the victim succumbed to his injuries. Boesem acted in the heat of passion, that is, in an uncontrollable rage and with an extreme emotional disturbance.
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 the Oglala Sioux Tribe Department of Public Safety. Assistant U.S. Attorney Heather Knox prosecuted the case.
Boesem was immediately remanded to the custody of the U.S. Marshals Service.