I am Mormon but I am interested more because it is a local story for me. I have children of my own and many of my relatives live here too. I would still be following this even if they were Catholic.
The parents are hiding something. They are lying. They won't tell us the truth. In fact, the police have told us many times that they are hiding information and the family has told that they can't tell us all that they know. The police/FBI have told them not to tell the media what they know. Try doing an interview on TV in a similar situation while having to be careful about every word you say because you have been told by the police not to divulge what you know. You want to tell as much as you know because it might help find Elizabeth yet, you don't want to tell as much as you know because it might hurt Elizabeth-reminds me of something I once heard like Loose lips sink ships. So, if the family looks like they are lying or hiding something, they are. Now, lets hope they are not hiding info or lying to the police.