Britain's Almost Perfect Murders

Emile Cilliers tries to murder his wife twice, first via a gas leak and then when that failed by sabotaging her parachutes - but her survival exposed the plot.

For years Carol Wray was seen as a fire survivor, until investigators uncovered a hidden pattern of arson that ended with her family dead.

Thomas Downey is murdered in Bath. DNA and CCTV lead to Darrell Richards being jailed in 2015.

Nurse Beverley Allitt murdered four children and harmed nine more in Lincolnshire, abusing trust until a pattern of deaths exposed her.

In 1930, Alfred Rouse murders a drifter in Northamptonshire, and burns the body to fake his own death; but a witness, a wallet and a number plate convict him.

Police officer Martin Forshaw kills fiancé, Claire Howarth, in Greater Manchester, just days before their wedding. His poor staging of a car crash led to a life sentence.

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After assaulting Lily Morris in her bungalow in 1984, William Mottershead is caught by chance and convicted of murder. The Judge says he is never to be released.

Dr Hawley Crippen flees to Canada but is caught and hanged for his wife Cora's murder in 1910. A discovery in 2007 suggests that the remains aren't hers.

The story of what happened when five people died at White House Farm in Essex in 1985. Jeremy Bamber framed his sister for the murders, but silencer forensics and boasting were his undoing.