COVINGTON, GA – A second teenager, 17-year-old Tashshawn Lyons of Conyers, has been arrested in connection with the fatal shooting of Justin Etienne during a Senior Skip Day gathering at Denny Dobbs Park last week, the Newton County Sheriff’s Office announced Monday. Lyons, a student at Salem High School, faces charges of murder, aggravated assault, possession of a firearm during the commission of a felony,…