8 Massachusetts residents charged for alleged role in drug and firearms trafficking conspiracy

BOSTON – Eight individuals have been charged for allegedly participating in a drug and firearms trafficking conspiracy.

According to the Massachusetts Department of Justice, the following defendants were arrested yesterday and remain detained following initial appearances in federal court in Worcester:

1. Alisa Walsh, 34, of Oakham, Mass., was charged with conspiracy to distribute controlled substances;
2. Osiris Berry-Vazquez, 23, of Worcester, Mass., was charged with distribution of controlled substances;
3. Fendy Martinez, 35, of Worcester, Mass., was charged with possession with intent to distribute and distribution of a controlled substance;
4. Luis Muniz, 33, of Worcester, Mass., was charged with distribution of controlled substances;
5. Luis Dick Rivera, 39, of Worcester, Mass., was charged with conspiracy to distribute controlled substances;
6. Fernando Valentin-Perez, 45, of Worcester, Mass., was charged with conspiracy to distribute controlled substances;
7. Omar Ramos-Jimenez, 27, of Worcester, Mass., was charged with dealing in firearms without a license and distribution of a controlled substance; and
8. Onix Aviles, 25, of Worcester, Mass., was charged with dealing in firearms without a license.

According to the charging documents, from March 2026 through April 2026, Walsh, Berry-Vazquez, Martinez, Muniz, Dick Rivera and Valentin-Perez allegedly sold controlled substances including cocaine, cocaine base (crack) and fentanyl to undercover law enforcement and confidential informants in and around Worcester.

It is further alleged that Aviles sold firearms without a license on two occasions, including a privately manufactured firearm. Ramos-Jimenez also allegedly sold several firearms and fentanyl to confidential informants in Worcester.

The charges of distribution of controlled substances and conspiracy to distribute controlled substances each provide for a sentence of up to 20 years in prison, at least three years up to lifetime of supervised release and a fine of $1 million. The charge of possession with intent to distribute and distribution of a controlled substance provides for a sentence of up to 30 years in prison, six years of supervised release and a fine of up to $2 million. The charge of dealing in firearms without a license provides for a sentence of up to five years in prison, three years of supervised release and a fine of $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 Foley; Special Agent Thomas Greco of the Bureau of Alcohol, Tobacco, Firearms & Explosives, Boston Field Division; Worcester Police Chief Paul Saucier; and Colonel Geoffrey Noble, Superintendent of the Massachusetts State Police made the announcement today. Valuable assistance was provided by the Drug Enforcement Administration; Homeland Security Investigations; t the Suffolk County Sherrif’s Department; and the Worcester District Attorney’s Office. Assistant U.S. Attorneys Kristen M. Noto, Brendan O’Shea and Zachary Stendig of the Worcester Branch Office are prosecuting the cases.

This case is part of the Homeland Security Task Force initiative established by Executive Order 14159, Protecting the American People Against Invasion.

The details contained in the charging document are allegations. The defendants are presumed to be innocent unless and until proven guilty beyond a reasonable doubt in the court of law.