Rhode Island man arrested in Massachusetts after 6 kilograms of ketamine, 6.6 kilograms of cocaine, 4.2 kilograms of MDMA seized

BOSTON – A Cranston, R.I., man pleaded guilty in federal court in Boston in connection with his role in distributing cocaine, MDMA and ketamine.

According to a release from the Massachusetts Department of Justice, 39-year-old Lengsy Prum, a/k/a, “Leon,” pleaded guilty to conspiracy to distribute and to possess with intent to distribute controlled substances. U.S. District Court Judge Julia Kobick scheduled sentencing for July 8, 2026. Prum was indicted by a federal grand jury in January 2025.

In June 2024, Prum was identified as a Rhode Island-based distributor of cocaine, MDMA and ketamine. On three occasions between July and August 2024, Prum distributed ketamine to undercover law enforcement – personally delivering the ketamine in the parking lot of a home improvement store in Attleboro, Mass. In total, Prum distributed 3.2 kilograms of ketamine to undercover law enforcement. During an August 2024 search of Prum’s residence in Cranston, six kilograms of ketamine, 6.6 kilograms of cocaine and 4.2 kilograms of MDMA were recovered.

The charge of conspiracy to distribute and to possess with intent to distribute controlled substances provides for a sentence of up to 20 years in prison, at least three years and up to a lifetime of supervised release and a fine of up to $1 million. 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; Jarod Forget, Special Agent in Charge of the Drug Enforcement Administration, New England Field Division; and Jeff Grimming, Acting Special Agent in Charge of Homeland Security Investigations in New England, made the announcement. Valuable assistance was provided by the Walpole Police Department. Assistant U.S. Attorney Samuel R. Feldman of the Narcotics & Money Laundering Unit is prosecuting the case.

This case is part of the Homeland Security Task Force (HSTF) initiative established by Executive Order 14159, Protecting the American People Against Invasion. The HSTF is a whole-of-government partnership dedicated to eliminating criminal cartels, foreign gangs, transnational criminal organizations, and human smuggling and trafficking rings operating in the United States and abroad.