A woman arrested as part of an investigation into 17 infant deaths at a UK hospital has been identified as a 28-year-old nurse. Lucy Letby, who began working in the neonatal unit of Countess of Chester Hospital as a student before graduating university in 2011, was taken into custody Tuesday by authorities accusing her of killing eight infants and trying to murder six others at the hospital between March 2015 and July 2016, per the BBC. A police presence was seen Tuesday at a Chester home linked to Letby, as well as at her parents' property in Hereford. Per journalist Mike McCarthy, Liverpool Women's Hospital is also investigating Letby's conduct during a period of training there. (More child murder stories.)