Desmond Holly, 16, who is suspected of shooting and critically injuring two students, had been “radicalized by an extremist network,” the authorities said.

Indications were that the teen, who later died of his self-inflicted wounds, had been “radicalized by some extremist network,” Jefferson County Sheriff’s Office spokesperson Jacki Kelley told

Authorities have identified 16-year-old Desmond Holly as the shooter behind the Evergreen High School attack in Colorado. Holly, a student at the school, injured two classmates before dying from a self-inflicted gunshot wound.