Former cabinet minister David Davis is investigating the conviction of Lucy Letby, a nurse serving 15 life sentences for murdering seven babies and attempting to murder seven others. Davis plans to visit Letby in prison if he is 'at least three-quarters persuaded' of her innocence, following concerns raised by medical experts regarding the evidence used in her trial. He aims to analyze extensive documentation and will come to a conclusion by September or October. If convinced of her innocence, he intends to raise the issue in Parliament and seek a Criminal Case Review Commission referral. The investigation follows claims of statistical inadequacies and potential mishandling of evidence during the trial, which have led to public and professional scrutiny. Davis's actions highlight concerns about the justice system's reluctance to acknowledge its mistakes, which may result in wrongful convictions.