BY NATHANIEL JONES ARLINGTON -- Nearly 13 years after the rape and killing of two young Arlington area educators, convicted murderer Dale Devon Scheanette is set to die Tuesday for the 1996 murders.The killings were dubbed the bathtub slayings because the victims Wendie Prescott, 22, and Christine Vu, 25 were found nude, strangled and bound with duct tape in their partially filled bath tubs.