NEWTOWN — The sentencing of Steven Santucci, a former Newtown police sergeant who recently admitted to leading a steroid trafficking ring, has been postponed until he completes an electrician’s training program. “Mr. Santucci is diligently planning for a second career and it would be beneficial if he could complete his technical training so that he can begin the new career as soon as his legal problems are behind him,” defense attorney Dan LaBelle wrote in a letter to the court.