The father of the Georgia school shooting suspect has been arrested and charged with two counts of second-degree murder. Colin Gray is also accused of four counts of involuntary murder and eight counts of cruelty to children. Two teachers and two students were killed in the attack at Apalachee High School in Winder, 50 miles northeast of Atlanta, on Wednesday. Colin Gray's son Colt, 14, surrendered when "engaged by school resource officers inside the school", Barrow County police said. He is accused of committing the fatal shootings with an assault-style rifle outside his algebra classroom.