Sioux Falls Man Sentenced to Over 4 Years in Federal Prison for Possessing a Firearm as a Felon

SIOUX FALLS - United States Attorney Alison J. Ramsdell announced today that U.S. District Judge Karen E. Schreier has sentenced a man from Sioux Falls, South Dakota, convicted of Possession of a Firearm by a Prohibited Person. The sentencing took place on August 18, 2025.

Quincy Lamar Johnson, 35, was sentenced to four years and three 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.

Johnson was indicted for Possession of a Firearm by a Prohibited Person by a federal grand jury in February 2025. He pleaded guilty on May 5, 2025.

Johnson was involved in a motor vehicle accident in Sioux Falls in July 2024 and was seriously injured. When he was removed from the vehicle, officers found a bag containing two 9mm pistols, which Johnson had placed on the floorboard of the car. At that time, Johnson was prohibited from possessing firearms because of felony convictions in Georgia for aggravated assault, assault with a firearm, and possession of a firearm by a felon/addict.

“This case and others like it demonstrate the effective partnership between the Sioux Falls Police Department and federal law enforcement,” said U.S. Attorney Alison J. Ramsdell. “Working together, we are interrupting violence in the community by removing illegally possessed firearms from our neighborhoods and holding violent offenders to account in federal court.”

Federal firearm prosecutions are 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 Sioux Falls Police Department and Homeland Security Investigations. Special Assistant U.S. Attorney Mark Joyce prosecuted the case.

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