Iain Lawrence was a family man, a businessman, a success. But if you scratched beneath the surface, a darker picture emerged.

A look at the investigation into the attempted murders of Gary Mullins and Colin Meek during an armed robbery in 1994.

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.

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?

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.

Colin Sutton recounts his investigation into an attack against an elderly couple, who were stabbed in their home by a man they knew well.

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.

An occult-obsessed man gets jail time after viciously stabbing his friend to death. Upon his release, he strikes again.

A reclusive millionaire, Allan Chappelow was brutally murdered by Chinese dissident and MI6 informant Wang Yam in an apparent identity theft scheme.

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.