Dylan Klebold

Dylan Bennent Klebold (September 11, 1981 - April 20, 1999) was one of the two gunmen of the Columbine High School massacre. On April 20, 1999, he, along with his friend, Eric Harris, planted two 20-pound propane bombs in the cafeteria of Columbine High School. When they didn't detonate, they went to plan B with their guns and started shooting.

They killed 12 students, one teacher and injured 24 others, then turned the guns on themselves.

12:08 PM April 20th 1999; He and his best friend (Eric Harris) suicide in the library at the same time together.

Media
Dylan Klebold is portrayed by Josh Young on the Columbine episode of Zero Hour.  He is also seen in the security camera footage as seen in Bowling For Columbine (2002).

The indie PC game called Super Columbine RPG is based on the Columbine Shootings. It is available here.