Brazilian National Pleads Guilty to Selling Nearly a Dozen Firearms

BOSTON – A Brazilian national unlawfully residing in Marlborough pleaded guilty today in federal court in Boston to trafficking firearms.

Guilherme Fernandes-Tavares, 32, pleaded guilty to one count of dealing firearms without a license. U.S. Senior District Court Judge Patti B. Saris scheduled sentencing for Feb. 26, 2026. Fernandes-Tavares was charged by criminal complaint in March 2025 and subsequently indicted by a federal grand jury in July 2025.

Between December 2023 and May 2024, Fernandes-Tavares sold 11 firearms and ammunition across 10 different dates and offered others for sale. Specifically, the firearms Fernandes-Tavares sold were pistols, some of which were privately manufactured firearms without serial numbers and one of which had an obliterated serial number. One of the firearms was sold with a large capacity magazine that could hold 28 rounds of ammunition. In addition, a package intended for Fernandes-Tavares sent from Florida was intercepted and found to contain an additional firearm.

The charge of engaging in the business of dealing firearms without a license provides for a sentence of up to five years in prison, three years of supervised release and a fine of up to $250,000. Sentences are imposed by a federal district court judge based upon the U.S. Sentencing Guidelines and statutes which govern the determination of a sentence in a criminal case.

United States Attorney Leah B. Foley; Thomas Greco, Special Agent in Charge of the Bureau of Alcohol, Tobacco, Firearms & Explosives, Boston Field Division; Michael J. Krol, Special Agent in Charge of Homeland Security Investigations in New England; and Patricia H. Hyde, Field Office Director, Boston, U.S. Immigration and Customs Enforcement’s Enforcement and Removal Operations made the announcement today. Valuable assistance was provided by the U.S. Postal Inspection Service; Massachusetts State Police; and the Westborough Police Department. Assistant U.S. Attorney John J. Reynolds III of the Organized Crime & Gang Unit is prosecuting the case.