999: Killer on the Line

In 2015, Dominic Isom killed his fiance Samantha Henderson at their Dorset home before calling to report her missing. Her family, unaware of his true nature, supported him while searching desperately for any trace of Samantha.

The story of how Merseyside resident Christopher Strettle spun a web of lies to the police after murdering his friend by shooting him in the chest.

The story of Brian Cox, who slashed the throat of father-of-five Mark Webb before washing away blood from the scene and lying about what had happened.

The chilling story of a lodger from Canterbury, Kent, who murdered his housemate and the man's girlfriend after a row over hot water.

The story of volatile former chef Robert Trigg, who was found guilty killing two of his former girlfriends five years apart.

A closer look at the case of Darren Byrne, a former city trader who killed his wife then tried to burn down the family home after she discovered he was having an affair.

In 2011 Julie Dixon murdered her fiance David Twigg by locking him in a cupboard and starting a fire. But she told police it was part of a suicide pact.

The sinister story of a woman with money problems who decides her husband is worth more dead than alive.