A 14-year-old boy used an AR-platform-style rifle in a high school near Atlanta, Georgia and killed two students and two teachers.

The 14-year-old shooter who confessed to killing four people last week at Apalachee High School in Georgia was allowed to leave his classroom with his belongings before returning with a rifle in his backpack,

The state agency said Colt Gray took the weapon into the Barrow County school, which does not have metal detectors, on his own. “The assault-style rifle could not be broken down, but Gray hid it in his backpack,