It truly is an amazing set of parallels, but other than circumstantial evidence, there's not really anything currently tying the two women together. It's strange that no one put two and two together like Hill did before, and now, people who could have been asked, such as her parents, are probably dead. Her siblings, if she had any, might still be alive, and would be in their 60s to potentially 80s. Apparently the person in charge of the movie archives for Jaws died, so they can't even ask them about the extra.

It'll be interesting to see if this recent round of stories picks up anything.

My concern is that anyone who might care about the woman is dead, and that her killer is the only one left alive.