Columbine High School and other Denver area schools closed while police searched for an armed woman ‘infatuated’ with Columbine, days ahead of the 20th anniversary of the school shooting.

Mass killers Eric Harris (left) and Dylan Klebold walk through the hallways at Columbine High School in trench coats in a video released by the Jefferson Country Sheriff's Department in 2004. AP ...

Columbine High School students Eric Harris, left, and Dylan Klebold, involved in the killings of 12 students and a teacher at the high school, are shown in this image made from video released by ...

Authorities had at least 15 "contacts" with the Columbine High School killers dating back two years before their murderous attack on their classmates, the state attorney general said Thursday ...

Five years ago today, Eric Harris and Dylan Klebold murdered their classmates and teachers at Columbine High School. Most Americans have reached one of two wrong conclusions about why they did it ...

The last time Chad Laughlin saw his buddy Dylan Klebold, the two almost smashed into each other in the parking lot of Columbine High School. Laughlin was driving his Mistubishi Galant, headed off ...

GOLDEN, Colo. (AP) — A videotape of the Columbine High School gunmen laughing and shooting at trees and bowling pins six weeks before they killed 12 classmates and a teacher ...

Mass shootings didn’t start at Columbine High, but the mass-shooter era did. Eric Harris and Dylan Klebold’s audacious plan and misread motives multiplied the stakes and inspired wave after ...

School shooters, including the killers at Sandy Hook Elementary School in Connecticut in 2012 and Virginia Tech in 2007, studied and emulated the Columbine attack.

The Columbine killers have claimed another victim. Nearly 26 years after two troubled Colorado teenagers barged into Columbine High School and opened fire, killing a dozen classmates and a teacher ...