Rosebud Man found Guilty of Sexual Abuse of a Minor and Abusive Sexual Contact

SIOUX FALLS - United States Attorney Alison J. Ramsdell announced that a jury has convicted Shane Mousseaux, age 37, of Rosebud, South Dakota, of three counts of Sexual Abuse of a Minor and two counts of Abusive Sexual Contact following a three-day jury trial in federal district court in Sioux Falls, South Dakota. The verdict was returned on April 18, 2024.

The charges for Sexual Abuse of a Minor each carry a maximum penalty of 15 years in federal prison and/or a $250,000 fine, up to life of supervised release, and a $100 special assessment to the Federal Crime Victims Fund. The charges for Abusive Sexual Contact each carry a maximum penalty of two years in federal prison and/or a $250,000 fine, up to life of life of supervised release, and a $100 special assessment to the Federal Crime Victims Fund.

Mousseaux was indicted by a federal grand jury in November of 2022.

Between August 6, 2020, and June 21, 2022, Mousseaux lived on the Yankton Sioux Reservation with his then-girlfriend and her children. During that time period, Mousseaux engaged in multiple sexual acts with one of his then-girlfriend’s daughter, 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 daughter, who was 14 years old at the time.

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.

A presentence investigation was ordered and a sentencing date has been set for July 19, 2024. The defendant was remanded to the custody of the U.S. Marshals Service.