(Providence, RI) -- A man identified in court as the "boss of bosses" of a large-scale international drug-trafficking operation is headed to federal prison for twenty years. The U.S. Justice Department says Juan Valdez of Milton, Massachusetts, was sentenced on Friday in federal court in Providence. Prosecutors say Valdez and his brothers organized and directed an operation that arranged for numerous multi-kilogram shipments of heroin and cocaine from Mexico to drug stash houses in Cranston and Woonsocket before the drugs went to mid-level and street dealers in southern New England. One of the brothers, Claudio Valdez, received a twenty-year sentence last month, while the other, Hector Valdez, is scheduled for sentencing next month.