A boy accused of killing four people at his high school in Georgia was interviewed last year by police about anonymous online threats, the FBI has said.
Colt Gray, 14, denied to police in May 2023 he was behind internet posts that contained images of guns, warning of a school shooting.
The suspect opened fire on Wednesday at Apalachee High School in the city of Winder, killing two teachers and two pupils, investigators say. Eight students and one teacher were injured.
He was arrested on campus and will be prosecuted as an adult.
