A doctor said she still cannot "truly explain" the fatal collapse of a baby girl, jurors in the murder trial of Lucy Letby were told on Friday.
Letby, 33, is alleged to have murdered seven babies and attempted to kill 10 others while she worked at the Countess of Chester Hospital's neo-natal unit. Premature-born infant, Child I, who cannot be identified for legal reasons, is said to have been the ninth child the defendant attacked from June 2015 to June 2016.
The Crown says the nurse murdered Child I at her fourth attempt by administering a fatal dose of air during the night shift of October 22-23, 2015.
