Nurse Lucy Letby, the United Kingdom’s most prolific child killer in the modern era, was sentenced to spend the rest of her life in prison for the killings of seven newborn babies and the attempted murders of at least six others. Summary Nurse Lucy Letby, the United Kingdom’s most prolific child killer in the modern era, was sentenced to spend the rest of her life in prison for the killings of seven newborn babies and the attempted murders of at …