Jackie & Cynthia last seen walking on Baseline Road near Power Road.. They told their mother that they were scheduled to babysit, but she learned later that they went to a party.. Jackie last seen walking with her sister on 7-31-1974..They were going to visit a friend & was located three blocks away from their own residence in the Desert Sands Mobile Home Park in Mesa... Teens at the party were questioned more than once.. Stories conflicted.. One teen said the sisters did show up at the party & others said they didn't..