Angela Cannings: The mother wrongfully convicted of killing her babies
Convictions Gone Bad with Will MellorContent warning: This article contains references to baby loss and Sudden Infant Death Syndrome (SIDS). For help and support, please visit our Advice and Support webpage.
Few criminal cases have had a greater impact on the British justice system than that of Angela Cannings. Once branded a child killer and sentenced to life imprisonment, Angela was cleared of all wrongdoing.
But how and why was Angela Cannings eventually cleared?
After fresh medical evidence cast serious doubt on the prosecution's case, the mother’s story is now regarded as one of the most significant injustices in legal history. Join Crime+Investigation as we explain the investigation and why the conviction was overturned.
Devasted by loss
Angela and her husband, Terry Cannings, suffered a series of heartbreaking tragedies.
Their first child, Gemma, died suddenly in 1989 at just 13 weeks old. Doctors attributed her death to Sudden Infant Death Syndrome (SIDS), often referred to as Cot Death. Two years later, their son Jason died unexpectedly at the age of seven weeks. Then, in 1999, another son, Matthew, died at just 18 weeks old.
While Gemma's death was accepted as a natural tragedy, the subsequent deaths began to attract scrutiny. Investigators became increasingly suspicious that so many unexplained infant deaths had occurred within the same family.
By the late 1990s, police had launched an investigation into whether the deaths were truly natural or the result of foul play. What began as a series of family loss soon evolved into a murder inquiry.
Why Angela Cannings was convicted
The prosecution's case centred on the belief that it was simply too unlikely for multiple children in the same family to die naturally.
At Angela’s trial in 2002, prosecutors alleged that she had smothered Jason and Matthew. Crucially, there was no physical evidence proving murder. No witness had seen any wrongdoing, and there was no forensic evidence demonstrating that either child had been deliberately harmed. Instead, the case relied heavily on expert medical testimony.
One of the prosecution's most influential witnesses was paediatrician Sir Roy Meadow, whose views on Cot Death had already become highly controversial. Meadow argued that multiple unexplained infant deaths within the same family were exceptionally rare and therefore suspicious.
His evidence encouraged the jury to view the deaths as unlikely to have occurred naturally.
The prosecution also pointed to aspects of Angela's behaviour that they considered unusual following the deaths. However, critics later argued that these observations amounted to little more than subjective interpretations of how a grieving parent should behave.
After deliberating for nine hours, the jury convicted Angela of murdering Jason and Matthew. In April 2002, she was sentenced to life imprisonment.
Fresh evidence changes everything
Even as Angela began serving her sentence, doubts about the conviction were growing.
At around the same time, other high-profile cases involving mothers accused of killing their children were beginning to unravel. Questions were being raised about the reliability of statistical evidence used in court and whether medical experts had overstated the rarity of multiple cot deaths within a single family.
A breakthrough came when new research and evidence from family history emerged. Investigations revealed that unexplained infant deaths had occurred among Angela's paternal ancestors, contradicting claims that there was no family history of such tragedies. Clinical geneticists concluded that a hereditary condition offered a plausible explanation for the deaths.
This evidence fundamentally weakened the prosecution's argument. If a genetic predisposition existed, then the assumption that the deaths must have been murders became far less certain.
Importantly, the new evidence also highlighted a broader problem: medical science still did not fully understand sudden infant death syndrome. Experts could not definitively explain why some babies died suddenly, nor could they confidently rule out natural causes in this case.
The appeal that set her free
The case returned to the Court of Appeal in December 2003.
The judges examined the fresh genetic evidence alongside growing concerns about the expert testimony presented at trial. They concluded that the convictions were unsafe. Significantly, the court ruled that when a case depends entirely on conflicting expert opinions, and there is no compelling independent evidence of guilt, a conviction may be unreliable.
The court dismissed both murder convictions, and Angela was released after spending approximately 20 months in prison. Emerging from court, she described her ordeal as a nightmare that had finally ended.
A case that changed the system
The impact of the case extended far beyond one wrongful conviction.
Following the appeal judgment, authorities reviewed hundreds of cases involving parents convicted of killing infants where expert medical evidence had played a decisive role. The ruling prompted a major re-evaluation of how unexplained infant deaths should be investigated and prosecuted.
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