Columbine High School massacre

Karl Halverson Pierson identified as Arapahoe High School shooting suspect

Authorities have identified 18-year-old Karl Halverson Pierson as the suspect gunman who opened fire at Arapahoe High School in suburban…

11 years ago

Colorado school shooting: Arapahoe High School gunman dead of self-inflicted gunshot wound

A student at Arapahoe High School in Colorado shot and wounded another student before dying of an apparent self-inflicted gunshot…

11 years ago

Adam Lanza had an obsession with Columbine, says Sandy Hook report

Adam Lanza, who killed 26 people at Sandy Hook Elementary School in Connecticut last year, had "an obsession" with the…

11 years ago