The Aryan Brotherhood, also known as the Brand, or the AB, is a white supremacist prison gang and  organized crime syndicate in the United States with about 10,000 members in and out of prison. According to the Federal Bureau of Investigation (FBI), the gang makes up less than 0.1% of the prison population, but it is responsible for up to 30% 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.