Wayland Patch 9/22/11: Senne Pleads Not Guilty to New Charges in Trooper’s Death. Former Wayland resident William Senne, 26, appeared at Plymouth County Superior Court Thursday and pleaded not guilty to charges related to the June death of Trooper Ellen Englehardt. Earlier this month a Plymouth County Grand Jury indicted Senne on charges of motor vehicle homicide. The charges come more than eight years after Senne, who was 18, crashed his vehicle into Englehardt's while intoxicated. The accident caused Englehardt severe brain damage, from which she never recovered. She died June 11, 2011. Senne pleaded guilty to causing the accident in 2005 and was sentenced to two and a half years in jail for operating under the influence to cause bodily injury.