 The Vols Parish 29-year-old Zachary Stephen Bullitt of Marksville has been arrested for the shooting death of his grandmother, 76-year-old Nellie Whitstein Rousseau. The Vols Parish Sheriff's Office says they responded to a reported homicide Saturday afternoon. Bullitt has been arrested and charged with first-degree murder and obstruction of justice. Bond has not been set, and the investigation is ongoing. LRN.