She was sentenced to life imprisonment and sent to a special approved school , being released from custody in 1980 .
Bell was ten years old at the time of one of the killings , and eleven at the time of the other .
Bell was sentenced to life imprisonment and sent to a special approved school , being released from custody in 1980 .
Bell was ten years old at the time of one of the killings , and eleven at the time of the other .