Preliminary investigation into the suspect who shot and injured two fellow students at Evergreen High School Wednesday found that he was “radicalized by some extremist network,” according to Jefferson ...

A 16-year-old Colorado student shot two classmates at Evergreen High School before killing himself, and an ADL report ...

A teenager accused of shooting students at a suburban Denver high school appeared to develop a "deep fascination" with mass shootings and shared neo-Nazi views online months before the attack, ...

A teen who opened fire in a Colorado high school this week was active on a so-called "violent gore" site months before the ...

Two teenagers are in critical condition after another teenager, who has since died, is suspected of opening fire in a ...

The teenager fired most of the rounds inside Evergreen High School outside Denver, sheriff's officials indicated Tuesday.

The Sept. 10 shooting happened at Evergreen High School in Evergreen, Colo., a mountain town about 35 minutes away from ...

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 ...

Mass shootings, political violence and school safety are front of mind for many Americans following a recent spate of ...

"They all seem to go through the same stages," said Dr. John Nicoletti, a psychologist who treats first responders and a ...

The shooting suspect fired a handgun inside and outside the school, said Jacki Kelley, spokesperson for the Jefferson County Sheriff's Office.

Robert Dear, 67, is accused of killing three people and wounding nine others at a Planned Parenthood clinic in Colorado ...