"In the early morning hours of September 25, 1982, George Emil Banks, appellant, went on a rampage in and near the City of Wilkes-Barre in Luzerne County. In the space of about one hour, appellant shot fourteen people with a Colt AR-15 semi-automatic rifle, killing thirteen and wounding one. All but one of the dead were the women and children who made up appellant's extended family; the other two victims were strangers (one survived) who were in the wrong place at the wrong time."