Sebastian Villasenor, 18, allegedly had "over a thousand rounds" of ammunition and 11 weapons, including seven rifles and one ...

Hours after she escaped the Columbine High School shooting, 14-year-old Missy Mendo slept between her parents in bed, still ...

April 20 marked the 25th anniversary of the Columbine High School shooting in Colorado, where a pair of gunmen killed 12 students and a teacher before taking their own lives. The attack remains ...

A rose stands at the plaque for Corey DePooter, one of the 12 student victims in the massacre at Columbine High School, at the Columbine Memorial on Wednesday in Littleton, Colo. The Associated ...

People Against Violence Enterprises was established after the Columbine High School massacre in Colorado in 1999.

It has been nearly 20 years since the first mass school shooting in the U.S. -- the shocking tragedy at Columbine High School in Littleton, Colorado, on April 20, 1999. As a “credible” threat ...

John Hagins, 22, pleaded no contest to charges of attempted manslaughter (firearm), attempted terrorism and written threats ...

The tracker focuses on the segment of planned school shootings where an active shooter, with intent to harm, injures or kills at least one student or faculty member during school or at a school event.

A social media account connected to the Nashville high school shooting suspect may have been in contact with the suspected ...

Rachel Joy Scott’s death made the news. As the first student killed in the 1999 shooting at Columbine High School, Scott’s name and face was broadcast around the world as news outlets ...

THE mass shooting at Columbine High School in Littleton, Colorado, took place on April 20, 1999. ©News Group Newspapers Limited in England No. 679215 Registered office: 1 London Bridge Street ...