In this file picture taken on January 22, 2009 Richard Holbrooke, US President Barack Obama's newly named Special Envoy to Afghanistan and Pakistan, listens during an announcement at the State Department in Washington, DC. Bosnian Serb wartime leader Radovan Karadzic filed on May 25, 2009 claimed to have witnesses to Holbrooke's promise of immunity in return for his disappearing from the public eye. Currently,  UN's International Criminal Tribunal for the former Yugoslavia (ICTY) is trying Karadzic on 11 counts of genocide, war crimes and crimes against humanity for his role in Bosnia's 1992-1995 war. Getty Images logo Getty Images 6 months ago

In this file picture taken on January 22, 2009 Richard Holbrooke, US President Barack Obama's newly named Special Envoy to Afghanistan and Pakistan, listens during an announcement at the State Department in Washington, DC. Bosnian Serb wartime leader Radovan Karadzic filed on May 25, 2009 claimed to have witnesses to Holbrooke's promise of immunity in return for his disappearing from the public eye. Currently, UN's International Criminal Tribunal for the former Yugoslavia (ICTY) is trying Karadzic on 11 counts of genocide, war crimes and crimes against humanity for his role in Bosnia's 1992-1995 war.