Aryan Brotherhood of Texas: How did neo-Nazi prison gangs become so powerful?

By Jon Kelly  
BBC News Magazine, Washington DC

Three US justice officials who tackled white supremacist prison gangs have been killed. Originally formed to fight other gangs, these groups are now accused of a range of criminal activities on the outside, from drug smuggling and kidnapping to murder. How did neo-Nazi prisoners set up huge criminal networks?

With skinhead haircuts and swastika tattoos, their leaders are buried deep within the brutal confines of America's penitentiaries.

But three murders in less than three months have shone a spotlight on far-right prison gangs, whose empire of drug-dealing, racketeering and murder extends well beyond the walls and barbed wire around them.