Desmond Holly’s focus on the 1999 massacre at Columbine High School is a central feature of these online extremist ecosystems ...

Police suspect the teenage gunman who carried out a school shooting in Colorado this week was “radicalized” before injuring ...

Since December, Desmond Holly, 16, had been active on an online forum where users watch videos of killings and violence, ...

At around 12:30 p.m. on Wednesday, Evergreen High School student Desmond Holly allegedly entered his school with a gun and ...

Authorities say Holly, the suspect who shot himself and died, was radicalized by an "extremist network" but didn't give ...

A report released Friday by the Anti-Defamation League's Center on Extremism revealed more about the student's activity online in the months before the shooting.

A report released Friday by the Anti-Defamation League's Center on Extremism revealed more about the student's activity ...

A 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 ...

As families, students, and the Evergreen community grapple with emotions and questions in the days since the shooting at ...