But in a twist seen in other school shootings by alienated teens, Harris' own brother was once a star athlete at Columbine. Kevin Harris, 20, was a gregarious athlete who built lasting relationships ...

The same band and design are historically tied to the Columbine tragedy, where Harris and co-perpetrator Dylan Klebold also sported KMFDM attire in public photos. Social media users were the first ...

those who played Doom over the Internet with Harris say he created a game level based on Columbine High School's floor plan. Investigators at the Simon Wiesenthal Center in Los Angeles, which flags ...