A doctor who helped catch killer nurse Lucy Letby said she came to a shocking conclusion after being handed a dossier of evidence.
Dr Sandie Bohin was called as an expert witness during Letby's trial, which ended with her being found guilty of murdering seven newborn babies and attempting to murder six others at the Countess of Chester Hospital.
Prosecutors handed her evidence to review including X-rays and medical records, as they investigated what was happening on the hospital's neonatal unit.
Dr Bohin's suspicions were aroused when she observed air trapped in the babies' blood vessels. The trial at Manchester Crown Court heard that Letby had injected milk, air or insulin directly into her tiny victims.
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