Just days after he was ordered to serve a seven-year prison term in one court, New England mobster Darin Bufalino today was sentenced to another seven years for his role in an organized crime ring allegedly led by Mark Rossetti, who has been identified in court records as both a top Mafia leader and an informant for the FBI. A prosecutor said Bufalino was an “assistant and an associate” of Rossetti and collected gambling and loan debts, as well as protection money for him.