The alleged Bosnian war criminal Radovan Karadzic is preparing to unveil a controversial defence at his trial in the Hague – that he was promised immunity from prosecution by America. Karazdic’s legal team has promised to present evidence of the deal later today.They will ask for the charges against him to be dismissed, claiming that an agreement was reached with Richard Holbrooke in 1996. He was the US peace envoy in Bosnia in the mid-1990s. Holbrooke has repeatedly denied any such deal, and the war crimes’ court has said that even if it exists it would probably not stand up in court. Karadzic is accused of war crimes and crimes against humanity committed during the 1992-95 Bosnian war. He was arrested in Belgrade last July after eleven years in hiding and faces life in prison if convicted. His fellow-suspect General Ratko Mladic is still on the run.