Rosebud Man Sentenced for Several Counts of Sexual Abuse of a Minor and Abusive Sexual Contact

SIOUX FALLS - United States Attorney Alison J. Ramsdell announced today that Chief Judge Roberto A. Lange, U.S. District Court, has sentenced a Rosebud, South Dakota, man convicted of three counts of Sexual Abuse of a Minor and two counts of Abusive Sexual Contact. The sentencing took place on August 9, 2024.

Shane Mousseaux, age 37, was sentenced to 11 years and three months in federal prison, followed by five years of supervised release, and a special assessment to the Federal Crime Victims Fund in the amount of $500.

Mousseaux was indicted by a federal grand jury in November of 2022. Mousseaux was convicted at trial on April 18, 2024.

The conviction stemmed from incidents between August 6, 2020, and June 21, 2022, when Mousseaux, who lived on the Yankton Sioux Reservation with his then-girlfriend and her children, engaged in multiple sexual acts with one of his then-girlfriend's daughters, who was 14-15 years old at the time. Between May 1, 2022, and June 21, 2022, Mousseaux engaged in sexual contact with another one of his then-girlfriend's daughters, who was 14 years old at the time.

This matter is being 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 Yankton Sioux Law Enforcement. Assistant U.S. Attorneys Ann M. Hoffman and Paige Petersen prosecuted the case.

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