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 ...

In the aftermath of the Columbine slaughter, Denver police sent officers to every high school to familiarize themselves with the layout and asked for blueprints of all the schools, Smith said. Ijames ...

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 ...

According to CBS News, the parent mentioned the 1999 mass shooting at Columbine High School, one of the most notorious such attacks in the US, which left 13 dead just 8km (5 miles) from Tuesday's ...

The recent Abundant Life Christian School shooting in Madison, Wisconsin, has sparked unsettling comparisons to the Columbine High School massacre after a chilling detail emerged: the 15-year-old ...

Sol Pais was reportedly obsessed with the 1999 Columbine high school massacre, in which two teenagers murdered 12 students and a teacher. The alleged threat led to school closures, affecting more ...

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 ...

After Columbine High classes resumed - at Chatfield High - two of ... He had found students outside the school who drew a rough layout of an 1,800-student high school. With no blueprint, incomplete ...