Ep 7. Michael Roberts

Michael Roberts, then thirty, brutally assaulted, raped and murdered women who lived alone in his neighborhood - aged 57, 66, 77 and 83 - through the late 80s. He went scot free till 2005, when advancements in forensic sciences led to a DNA match - and his conviction. Roberts was known as the "The Praying Rapist" after a victim recounted him crossing himself and praying.