Efrain Hernandez Vasquez of Groton, known as “Frao,” 38, was sentenced today by U.S. District Judge Janet Bond Arterton in New Haven to 46 months of imprisonment, followed by four years of supervised release, for distributing heroin.

Vasquez was one of more than 100 people arrested last year following an investigation by local, state and federal authorities into the large-scale trafficking of heroin and cocaine from the Dominican Republic and Puerto Rico into and around southeastern Connecticut.

According to the U.S. Attorney’s office, on multiple occasions in early 2013, Hernandez Vasquez was intercepted over a court-authorized wiretap ordering five-gram quantities of heroin from his drug supplier, Luis Ariel Capellan Maldonado, for distribution purposes. He has been incarcerated since February 2013 and pleaded guilty in December 2013 to one count of conspiracy to possess with the intent to distribute heroin.

Capellan Maldonado has pleaded guilty and awaits sentencing.