What we know so far Two students and two teachers were killed in the shooting yesterday at Apalachee High School in Winder, Georgia, Nine others were injured and are expected to recover. The 14-year-old suspect, Colt Gray, who used an AR-style weapon in the shooting, surrendered immediately and was taken into custody within minutes. He was charged with four counts of murder today. The suspect's father, Colin Gray, 54, was arrested on four counts of involuntary manslaughter, two counts of second-degree murder and eight counts of cruelty to children, the Georgia Bureau of Investigation said today. Colin Gray gave his son an AR-15 style rifle as a gift, two law enforcement sources said. It's unclear when he gave the gift, but it was after authorities interviewed the father and son last year in connection with threats to carry out a school shooting, The suspect was a new student at Apalachee High, having only been there for a partial day. The day of the shooting was his first full day at the school, Barrow County Sheriff Jud Smith said. The Georgia Bureau of Investigation identified the victims killed as Mason Schermerhorn, 14; Christian Angulo, 14; Cristina Irimie, 53; and Richard Aspinwall, 39.