Overview: Iain Lawrence was a family man, a businessman, a success. But if you scratched beneath the surface, a darker picture emerged.
Overview: A look at the investigation into the attempted murders of Gary Mullins and Colin Meek during an armed robbery in 1994.
Overview: Colin Sutton and team make a horrific discovery when 43-year-old Eastenders actress Sian Blake and her two children are reported missing in 2015.
Overview: The killings of of James Attfield and Nahid Almanea in 2014 15-year-old Essex boy James Fairweather. Was the teenager's Ripper obsession to blame or was their more to his story?
Overview: Former detective Colin Sutton details how he and his team worked on the cold-case investigation of Catherine Corridan's disappearance alongside other high-profile cases.
Overview: Colin Sutton recounts his investigation into an attack against an elderly couple, who were stabbed in their home by a man they knew well.
Overview: After being picked up by NHS worker Duncan Bone at King's Cross in 1992, Karl Warne and Colin Lockett would murder their host at his flat.
Overview: An occult-obsessed man gets jail time after viciously stabbing his friend to death. Upon his release, he strikes again.
Overview: A reclusive millionaire, Allan Chappelow was brutally murdered by Chinese dissident and MI6 informant Wang Yam in an apparent identity theft scheme.
Overview: The story of Michael Danaher, who found himself deep in debt, prompting him to draw up a list of famous and wealthy robbery targets. But his plans resulted in vicious murder.