The Columbine High School massacre of April 20, 1999, was the deadliest high school massacre in American history. The perpetrators, Eric Harris and Dylan Klebold, killed 12 students and one teacher, wounded 21 others, and then committed suicide. Their original plan was to blow up the school and gun down survivors followed by detonation of bombs in their cars, killing 500 people, but their propane bombs in the cafeteria and their cars failed to detonate.
The Columbine massacre has been mentioned by detectives related to the issues of bullying, anti-depressants and video games. Adam Nesbit, driven by his mother's paranoia, believed that events like Columbine were a common occurrence in America. (SVU: "Home") Donald Cragen once mentioned Eric Harris' yell of "All jocks stand up!", which was heard on a 911 call. (SVU: "Manic") Dr. George Huang mentioned Columbine as an example of how video games are blamed for teenagers committing violence. (SVU: "Game")