True Crime Serial Killer Podcasts are huge . But Why? What is it about gruesome stories that suck people in . Jon's says no thank you when it comes to True Crime - whereas Mel Loves them - up to a point . Does she have a darker side ? We call in Rob McKnight - successful Producer of a True Crime Podcast which he also co hosts . Monsters Who Murder - Serial Killer Confessions has over a million downloads . Some of Robs stories are riveting buy also real eye openers . Why Rob makes true crime podcasts may surprise you.