the world spotlight shines on a german courtroom in the trial of the ` bookkeeper ' oskar groening , hidden in the shadows are the forgotten women who served as guards at hitler 's death camps .
now , seven decades on and in the twilight of their lives , these former ss guards who ruled the human slaughterhouse auschwitz with an iron fist will go to their graves having escaped justice .
of the 3,700 women who served at nazi death camps , just three were investigated by prosecutors in germany for their roles as accomplices to mass murder .