McKeesport Felon Pleads Guilty to Possession of Firearm and Ammunition

This release was published following the 43-day government shutdown during which the plea occurred.

PITTSBURGH, Pa. - A resident of McKeesport, Pennsylvania, pleaded guilty in federal court on October 2, 2025, to a charge of violating a federal firearms law, First Assistant United States Attorney Troy Rivetti announced.

Thomas Thornton, 48, pleaded guilty before United States District Judge Christy Criswell Wiegand to a one-count Indictment charging Thornton with possession of a firearm and ammunition by a convicted felon.

In connection with the guilty plea, the Court was advised that, on December 19, 2024, Thornton discharged 10 rounds of ammunition from a stolen 9mm semi-automatic pistol into an occupied residence within the City of Pittsburgh. Officers with the Pittsburgh Bureau of Police arrested Thornton within minutes of the shooting. Following the execution of a search warrant on Thornton’s vehicle, officers recovered the 9mm pistol Thornton used in the shooting. Thornton was previously convicted on federal drug trafficking and firearms offenses, and was also on federal supervised release at the time of the instant offense. Federal law prohibits possession of a firearm or ammunition by a convicted felon.

Judge Wiegand scheduled Thornton’s sentencing for February 4, 2026. The law provides for a maximum total sentence of up to 15 years in prison, a fine of up to $250,000, or both. Under the federal Sentencing Guidelines, the actual sentence imposed would be based upon the seriousness of the offense and the prior criminal history of the defendant.

Assistant United States Attorney V. Joseph Sonson is prosecuting this case on behalf of the United States.

The Pittsburgh Bureau of Police and Bureau of Alcohol, Tobacco, Firearms and Explosives conducted the investigation that led to the prosecution of Thornton.

This case is part of Project Safe Neighborhoods (PSN), a program bringing together all levels of law enforcement and the communities they serve to reduce violent crime and gun violence, and to make our neighborhoods safer for everyone. On May 26, 2021, the Department launched a violent crime reduction strategy strengthening PSN based on these core principles: fostering trust and legitimacy in our communities, supporting community-based organizations that help prevent violence from occurring in the first place, setting focused and strategic enforcement priorities, and measuring the results.