ATF - Bureau of Alcohol, Tobacco, Firearms and Explosives

07/18/2025 | Press release | Archived content

Martin Man Sentenced to Nearly Five Years in Federal Prison for Illegal Possession of a Firearm (DOJ)

Press Release

Martin Man Sentenced to Nearly Five Years in Federal Prison for Illegal Possession of a Firearm

Friday, July 18, 2025
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For Immediate Release
U.S. Attorney's Office, District of South Dakota

RAPID CITY - United States Attorney Alison J. Ramsdell announced today that U.S. District Judge Camela C. Theeler has sentenced a Martin, South Dakota, man convicted of Possession of a Firearm by a Prohibited Person. The sentencing took place on July 14, 2025.

Aloysius Mousseau, 23, was sentenced to four years and eight months in federal prison, followed by three years of supervised release, and ordered to pay a $100 special assessment to the Federal Crime Victims Fund.

Mousseau was indicted for Possession of a Firearm by a Prohibited Person by a federal grand jury in January 2025. He pleaded guilty on April 22, 2025.

In November 2024, officers with the Rapid City Police Department found Mousseau with a pistol. Mousseau gave a false name and age to law enforcement. Mousseau had been convicted for crimes punishable beyond a year in prison. Possessing any firearm after such conviction is a felony offense.

This case is part of Operation Take Back America, a nationwide initiative that marshals the full resources of the Department of Justice to repel the invasion of illegal immigration, achieve the total elimination of cartels and transnational criminal organizations (TCOs), and protect our communities from the perpetrators of violent crime. Operation Take Back America streamlines efforts and resources from the Department's Organized Crime Drug Enforcement Task Forces (OCDETFs) and Project Safe Neighborhood (PSN). Through PSN, the District of South Dakota seeks to bring together all levels of law enforcement and the communities they serve to reduce gun violence and make our neighborhoods safer for everyone.

This case was investigated by the Bureau of Alcohol, Tobacco, Firearms, and Explosives and the Rapid City Police Department. Assistant U.S. Attorney Benjamin Schroeder prosecuted the case.

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

Contact

usasd.press@usdoj.gov

Updated July 18, 2025
Topics
Operation Take Back America
Violent Crime
Component
USAO - South Dakota
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