World-renowned doctor, Waney Squier, tells Dominic Lawson the price she paid for changing her mind about shaken-baby syndrome. Having supported the existence of the syndrome and testified that people - often parents - were the ones inflicting death and serious injury on children this way, she changed her mind.

Waney Squier was one of the foremost medical experts on the developing brain of infants and babies before their birth. She appeared many times as an expert witness for the prosecution in cases of shaken-baby syndrome. But she changed her mind and decided the evidence now suggests this syndrome does not exist, casting doubt on any explanations for a baby's demise that rest on this theory. Her change of mind was followed by a complaint from the police that led to her being struck off the medical register. Here she tells her story, and how her change of mind led to professional disaster and personal heartache.

Producer: Jonathan Brunert.