Nick McKenzie: Ben Roberts-Smith - the war hero turned criminal

Earlier this month Australia's most decorated soldier Ben Roberts-Smith lost his defamation case against three newspapers who reported he had murdered civilians in Afghanistan. While not a criminal trial, the court judged him responsible for the deaths of four Afghans while deployed during 2009-2012. Investigative journalist Nick McKenzie brought the allegations to the public eye and has spent five years working on the story.