Former nanny Aisling Brady McCarthy has hit out at her “scandalous” treatment by US prosecutors.

The murder trial of Aisling Brady McCarthy — the Irish nanny accused of fatally assaulting a one-year-old girl in Boston — has been postponed in a dramatic development which saw a judge order a full review of medical evidence relating to the baby’s death.

Lawyers for an Irish nanny accused of killing a baby in the US said medical experts hired by prosecutors have concluded that the child suffered bone fractures weeks before her death when she was not in the nanny’s care.

A high-profile defence lawyer has been added to the legal team of Irish nanny Aisling Brady McCarthy whose Boston trial for murder is now just over two months away.