The 7th series opens with Nell Darby looking at the case of Kirsty Carver. Kirsty worked as a civilian employee of Humberside Police. After she disappeared police organised a search for her. Her killer would be revealed as Craig Belcher.

Following the discovery of his affair with a much younger woman, police Sergeant Stephen Jones killed his wife Madeline with his truncheon in their garage at home.

Elderly couple Benjamin and Dorothy were killed in their own home in one of the most terrifying home invasions ever seen.

Marie Buls was an elderly woman in the care of wealthy spinster Noreen O'Connor. As time progressed O'Connor became convinced that Marie was possessed by the devil.

Defending herself against her husband Robert, Hazel Williams bludgeoned him to death. She then proceeded to hide his body in the cellar of their home in Penmaenmawr on the North Wales coast and told people he had left her.

In 1949, Donald Hume murdered his business partner Stanley Setty following an altercation in which the killer's dog was kicked. Setty was stabbed to death, his head and legs cut off and his torso dumped from a plane over the Essex marshes.

Teenager James McElroy was on holiday with his friends, twins Mark and Michael Otter, in Trawsfynydd, Gwynedd, Wales in 1982 when he turned on the boys and murdered them with a shotgun before shooting himself.

Herbert Bennett tired of his wife Mary Jane and strangled her with a bootlace in the sands off Yarmouth beach and was hanged for the crime at Norwich prison in 1901.

Teenager Clive Olive was a young member of the local biker gang the 'Sussex Mad Dogs', but after crossing gang leader Brian Moore, he found himself sentenced to death. Olive was lured into a van, badly beaten and dumped in the sea.

Torquay businessman Martin 'Marty' Fenton fell out with the owner of the local casino John Tsigarides. He exacted his revenge with a murderous shooting spree that claimed 4 lives just days before Christmas in 1973.