Clark was wrongfully sentenced to life in prison for the deaths of one young son in 1996, and another, a two-month old, in 1998. She was released after three years in jail after an expert witness, Professor Roy Meadow, was discredited. Meadow wrote in his book that “one sudden infant death is a tragedy, two is suspicious and three is murder, unless proven otherwise”. He claimed in court that there is a one in 73 million chance of two cot deaths in a wealthy family, but the Royal Statistical Society said there was no basis for this claim. Following her release, other cases that relied on evidence from Meadow were re-examined, and another mother, Angela Cannings, also had her conviction for murder overturned. But Clark never recovered from her imprisonment and became an alcoholic. She died of alcohol poisoning in 2007.