While convicted baby-killer Lucy Letby languishes in prison , police are widening their investigation into senior staff at the NHS hospital she worked at. Letby is serving 15 whole-life terms for murdering seven newborns and attempting to kill another seven between 2015 and 2016 while working as a nurse at the Countess of Chester Hospital in Chester . After her initial trial and conviction, she was tried again in July last year for the attempted murder of a premature baby girl. The child