Dubbed the UK’s “worst sex offender,” Scottish rapist and murderer Iain Packer is currently serving the second-longest prison term in the nation’s history. But he very nearly got away with it. That was, until investigative journalist Sam Poling began a relentless investigation — now a podcast and documentary — into the 2005 unsolved murder of Glasgow woman Emma Caldwell, whose naked body was discovered in isolated woods. While Packer had been on the police radar since the beginning, Poling says