The suspected shooter, a boy wielding a revolver, was a student at the school. His name has not been released, nor has his motive.

Two Evergreen High School parent groups raised concerns about the availability of school resource officers in the hours before Wednesday’s shooting that critically wounded two high school

Derek Kinshasa, lieutenant with Evergreen Fire and Rescue, hangs a sign for Evergreen High School from a fire truck before a vigil Thursday evening following Wednesday’s shooting at Evergreen High School. Local and state leaders were also in attendance, including Gov. Jared Polis.

EVERGREEN, Colo. — Triplets Katie, Bella and Hailey Clarkson, 15 years old, were spending their lunch break together in a classroom Wednesday at Evergreen High School when gunfire erupted. One of the sisters, Katie, captured the moment on video as they huddled together with a teacher, hiding from the shooter.

The Jeffco Sheriff’s Office is sharing more information about the incident and saying they think locked doors saved many lives.

When a 16-year-old student began shooting and kept reloading his gun at Evergreen High School around noon on Wednesday, the police officer assigned to the campus was not on duty. That full-time school resource officer (SRO) was on medical leave.

A teenager suspected in a shooting attack at a suburban Denver high school that left two students in critical condition appeared fascinated with previous mass shootings including Columbine and expressed neo-Nazi views online,