From Wikipedia, the free encyclopedia.
The Trenchcoat Mafia is the self-assigned name of a group of outcast students at Columbine High School in Colorado.
Two pheripheral members, Eric Harris, and Dylan Klebold, committed the Columbine High School massacre. By the time the incident happened, most of the original "true" members had either graduated or dropped out.
The group is not in any way associated with the well known Mafia.
