WHO KILLED SUSAN SUNDAY?

As reported by https://www.websleuths.com/forums/threads/nj-susan-sunday-16-the-unsolved-murder-of-a-south-brunswick-girl-who-walked-her-dog-in -the-woods-and-never-came-home-1-oct-1971.645822/ , Susan Sunday was abducted on 1 October 1971 on her way to Perinton to meet friends at the cinema after walking her dog, who had returned alone at home. The victim was found dead on December 27, 1971 on Sandhill Road in South Brusnwick, off Bedford Road, New Jersey.