High Quality Content by WIKIPEDIA articles! The Aryan Brotherhood, also known as The Brand, the AB, or the One-Two, is a white prison gang with about 15,000 members in and out of prison. According to the FBI, although the gang makes up less than one percent of the prison population, it is responsible for up to 18% of murders in the federal prison system. The AB has focused on the economic activities typical of organized crime entities, particularly drug trafficking, extortion, inmate prostitution, and murder-for-hire.