Missing people in missing people's lives

This didn’t really fit nicely in any particular forum. It’s actually a GQ, just not ver GQ-worthy.

Missing person Natalee Holloway’s mom has been a fixture on news programs since the beginning, but I have yet to see her father (but I think I’ve seen her stepdad). Is he still living, and has he been shown?

Similarly, Laci Peterson’s mom and stepdad were fixtures during the time that her case was in the news. I don’t think I ever saw a reference to her father. Anyone?

There was a guy standing next to the mom on a show I saw yesterday. I assumed it was her father, but I haven’t really been paying close attention to this situation, so it could have been a step-father.