Also known as the AB, Aryan Brotherhood is a white supremacist group that was formed in 1967, at San Quentin prison in California. They currently have approximately 15,000 members, in and out of prison. Initially formed for the protection of whites against blacks in prison, the gang gradually moved to becoming a criminal enterprise. The AB are concerned with white-supremacy, and are a ruthless gang who regularly murder those who oppose the system, growing so out of control at times, that even their own ranking members could not consider themselves safe. In prison, they strive to control the sale of drugs, gambling, and “punks,” or male prostitutes. The Aryan Brotherhood has carried out contract killings for the Mexican Mafia, but racist beliefs prevent members from consorting with African Americans, including even taking a cigarette or a candy bar from them. The only way to be a member is to abide by their philosophy of “Blood In – Blood Out.” -Kill somebody to become a member and die to part from it. AB members make up approximately 1% of the prison population nationwide, but are responsible for up to 18% of murders in the federal prison system.