The Most Notorious Gangs in Prison | National Geographic Documentary 2019

The most notorious gangs in prison national geographic documentary 2019 highlights the most dangerous and notorious gangs in USA Prisons!

A prison gang is an inmate organisation that operates within a prison system. It has a corporate entity and exists into perpetuity. Its membership is restrictive, mutually exclusive, and often requires a lifetime commitment. Prison officials and others in law enforcement use the euphemism "security threat group".