A 14-year-old boy has killed four people, including two students, and wounded nine more when he opened fire at a high school in the US state of Georgia, the latest chapter in America's gun violence..
Colt Gray, a 14-year-old Apalachee High School student, is in custody for a shooting on September 4, which left two teachers and two students dead, and nine others hospitalized. Gray used an AR-15..