Maryland Man Receives 110-Month Sentence for Felon Firearm Possession and Fentanyl Trafficking

Greenbelt, Maryland — Dominick Mackall, 37, of Lexington Park received a 110-month prison sentence today in U.S. District Court for the District of Maryland after pleading guilty to possessing firearms and ammunition as a convicted felon and possessing fentanyl and cocaine with intent to distribute.

U.S. District Judge Deborah L. Boardman imposed the term, which will be followed by four years of supervised release, according to the Department of Justice release dated May 13, 2026. Mackall is one individual whose removal affects local drug markets in St. Mary’s County, where federal prosecutors have targeted overlapping gun-and-drug networks for the past several years.

The sentence shifts Mackall from pretrial or presentence status to immediate incarceration in the federal Bureau of Prisons system. He must serve the full 110 months before beginning supervised release; standard federal good-time credit rules will apply but do not reduce the term below roughly 93 months.

Downstream, the conviction triggers permanent federal firearms prohibitions that survive the sentence and requires Mackall to forfeit any seized weapons and ammunition. The removal of fentanyl from circulation in Lexington Park and surrounding areas forces remaining distributors to adjust supply lines, while the four-year supervised-release term places Mackall under U.S. Probation Office monitoring that includes drug testing, travel restrictions, and potential re-incarceration for violations.

Federal agents and local police in Southern Maryland will treat the case as precedent for similar prosecutions that combine 18 U.S.C. § 922(g) felon-in-possession counts with 21 U.S.C. § 841 controlled-substance violations.

This sentencing continues a pattern of federal cases in the District of Maryland that pair firearm enhancements with fentanyl trafficking charges. The Department of Justice has pursued such combined prosecutions since fentanyl-related overdose deaths began rising sharply in the mid-2010s; the Mackall case follows dozens of comparable sentencings in the same courthouse that have produced multi-year terms for mid-level dealers who carried guns.