The closest you can get to the most dangerous minds.Find out what truly makes a psychopath, from the leading expert who helped to create Killing Eve's Villanelle. Dr Mark Freestone has worked on some of the most disturbing psychopath cases of recent times - this is his extraordinary journey with the people society would rather forget.Danny 'the Borderline' killed his defenceless friend without explanation. Tony 'the Conman' once tried to d...