You need to read my blog, especially
this post. Here's the key paragraph:
Patsy Ramsey is no longer with us. Burke Ramsey was too young to be prosecuted. But this doesn't matter, because the only inhabitant of that house on that night likely to have sexually molested the victim was the only adult male in the house: John Ramsey. And yes, she was sexually molested, on the night of the crime, if not on earlier occasions as well. And hence: (hint hint) John Ramsey is, and always has been, the one you want to prosecute.
If nothing else, he could be accused of molestation, since there was no intruder and the only mature male in the house is by far the most likely to have sexually assaulted the victim. And the molester is the most likely to have committed the murder, so he could be accused of that as well. He would then be forced to take refuge in the lame intruder theory, or claim he was only covering for Patsy or Burke. Since he's spent the last 16 years vociferously denying any involvement by anyone in his family, I really doubt he'd have the guts to do that. But if he felt he had no choice, and Patsy or Burke are in fact the ones who did it, then the truth would finally come out.
This is the ONLY way to go I'm afraid. There's no way to put him on trial as an accessory. And in my book there's no question he both molested and killed his daughter. If he wants to deny that then let him make his case to a jury.
The problem is that too many following the case have pet theories that they simply refuse to let go of, and there is no way Patsy did it or Burke did it will ever lead to any sort of indictment, much less a conviction. There are very good reasons, however, to indict and try John Ramsey.