 Bell Yard was then hired by the so-called NatWest Three to campaign against their extradited to the US on charges relating to the collapse of the American energy giant Enron.Riley has since maintained an interest in the extradition space and recently campaigned on a pro-bono basis on behalf of Asperger's sufferer Gary McKinnon against his extradition to the US.McKinnon admits to having hacked into Pentagon computers in a bid to prove the existence of little green men.