Kaseem Patterson
Introduction
Kaseem Patterson, 26, of Upper Darby, Pennsylvania, was charged by indictment on 20 October 2026 with possession of a firearm by a felon and possession of a machine gun, after prosecutors alleged he kept four loaded firearms — including a 9mm pistol fitted with a machine gun conversion device — in violation of both his prior felony and the federal machine-gun statute. Patterson was taken into federal custody the day the indictment was announced and made his initial appearance that afternoon before U.S. Magistrate Judge Craig M. Straw.
Background Information
Patterson had previously been convicted of a crime punishable by imprisonment for a term exceeding one year, which barred him from possessing firearms or ammunition. The indictment alleges that on or about 11 May 2026 he knowingly possessed four loaded firearms, among them the 9mm pistol equipped with a conversion device intended for use in converting a semi-automatic weapon to fire automatically — the class of device federal prosecutors in Philadelphia have made a charging priority as machine-gun conversions have spread through the region’s illegal gun market.
The Controversy or Incident That Led to Their Cancellation
Charged, not convicted. Patterson faces a two-count federal indictment for firearm possession by a felon and possession of a machine gun; the charges are accusations, he has not been tried, and he is presumed innocent.
The case against Patterson rests on the May 2026 possession alleged in the indictment and the four loaded firearms described in it, with the machine-gun count attaching specifically to the conversion-device pistol. If convicted on both counts, he faces a maximum possible term of 25 years in prison — the felon-in-possession count stacked beneath the machine-gun statute’s own exposure. The case was investigated by the Tinicum Township Police Department and the Bureau of Alcohol, Tobacco, Firearms and Explosives, and is being prosecuted by Assistant United States Attorney Sandra Urban.
Public Reaction and Consequences
Patterson’s initial appearance before Magistrate Judge Straw on the day of his arrest put him in federal custody within hours of the indictment’s unsealing. The arrest also illustrates the working pattern of Delaware County gun prosecutions: a township police department and the ATF building the case together, and a U.S. Attorney’s office charging the conversion device itself as a machine gun — the theory that converts a felon-with-a-gun case into one carrying decades.
Current Status
Patterson is in federal custody awaiting further proceedings on the two-count indictment. The single-page charging document leaves most of the story untold — where the firearms were found, and how — and both counts remain unproven allegations that the government must establish beyond a reasonable doubt at trial. No trial date has been announced.
Impact on Their Career/Life
A 26-year-old previously convicted felon now faces a 25-year statutory ceiling over an arsenal prosecutors say included a gun configured to fire automatically. Whatever the May 2026 possession was for, the machine-gun count alone marks Patterson as part of the conversion-device wave that has reshaped federal gun charging in the Eastern District of Pennsylvania — and puts the remainder of his twenties and thirties at stake in a single indictment.
Sources
- U.S. Attorney’s Office, Eastern District of Pennsylvania, “Delco Man Indicted for Illegal Possession of Firearms, Including One Fitted With Machine Gun Conversion Device” — source