By Tiffany Williams –
MASSACHUSETTS — Two major investigations unfolding in Boston and Worcester have resulted in a string of arrests and serious trafficking allegations, as law enforcement agencies say they targeted individuals accused of distributing fentanyl, crack cocaine, cocaine and firearms in communities already battling the consequences of addiction and violent crime.
In Boston, investigators say a narcotics operation centered in the heart of the city ended with a search warrant execution and the seizure of suspected drugs inside a residence near some of the city’s busiest streets.
According to Boston Police, members of the District C-6 and A-1 Drug Control Units, working alongside DEA FIT Team members, concluded a narcotics investigation on May 30 targeting what authorities described as a drug distribution network operating in the Chinatown and Theatre District neighborhoods.
At approximately 11 a.m., officers conducting surveillance near 285 Tremont Street observed a subject exit the rear of the building and walk toward Oak Street West.
Police approached the individual, identified themselves and advised him they were in possession of search warrants for both his person and his residence.
Investigators recovered a cell phone and an undisclosed amount of U.S. currency from the subject.
The focus of the investigation then shifted inside the residence.
According to police, officers executing the search warrant recovered approximately 18 grams of fentanyl, approximately 10 grams of crack cocaine, 77 Suboxone film strips and an undisclosed amount of U.S. currency.
Authorities identified the suspect as Li Wei Mei, 33, of Boston.
Police said Mei was transported to Nashua Street Jail for booking and later arraigned in Boston Municipal Court on charges of Trafficking a Class A Substance (Fentanyl) and Trafficking a Class B Substance (Crack Cocaine).
The allegations underscore the continuing presence of fentanyl in Massachusetts communities. Fentanyl remains one of the most dangerous narcotics encountered by law enforcement because of its potency and its role in overdose deaths throughout New England.
While that investigation was unfolding in Boston, federal authorities announced a separate and wide-ranging case centered in Worcester.
Eight individuals have been charged for allegedly participating in what investigators described as a drug and firearms trafficking conspiracy operating in and around Worcester.
Federal authorities said those charged include Alisa Walsh, 34, of Oakham; Osiris Berry-Vazquez, 23, of Worcester; Fendy Martinez, 35, of Worcester; Luis Muniz, 33, of Worcester; Luis Dick Rivera, 39, of Worcester; Fernando Valentin-Perez, 45, of Worcester; Omar Ramos-Jimenez, 27, of Worcester; and Onix Aviles, 25.
According to charging documents, investigators allege that from March 2026 through April 2026, Walsh, Berry-Vazquez, Martinez, Muniz, Dick Rivera and Valentin-Perez sold controlled substances including cocaine, cocaine base and fentanyl to undercover law enforcement officers and confidential informants in and around Worcester.
Authorities further allege that firearms trafficking was also part of the investigation.
According to court documents, Aviles allegedly sold firearms without a license on two occasions, including a privately manufactured firearm.
Investigators also allege that Ramos-Jimenez sold several firearms and fentanyl to confidential informants in Worcester.
The allegations paint a picture of parallel criminal enterprises involving both narcotics and firearms, a combination that law enforcement agencies frequently identify as a significant public safety concern because of the connection between illegal drug distribution and gun violence.
The arrests represent the culmination of months of investigative work involving undercover operations, confidential informants and coordinated law enforcement efforts.
From Boston’s Chinatown and Theatre District neighborhoods to the streets of Worcester, investigators allege the cases involved the movement of dangerous narcotics and, in some instances, firearms into Massachusetts communities.
All charges are allegations. Every defendant is presumed innocent unless and until proven guilty in a court of law.