Paul Bergrin, a Newark, N.J., criminal defense lawyer accused of being at the center of a criminal enterprise, pleaded not guilty in federal court on Monday to a raft of charges that include murder and drug trafficking.

The superseding indictment presented to U.S. District Judge William Martini in Newark almost tripled to 39 the original 14 counts lodged against the former federal and Essex County prosecutor, who was arrested six months ago. It also added three more codefendants, for a total of seven.