"Something always smelled bad to me about it though, and I've never been able to figure out what."
Ditto that. Yet I don't believe the parents killed her.
I never want to get obsessed with cases like this, so I'm sure there are many people who've followed it closer than I have. But for a while there this case was difficult to get a break from.
I don't know that either parent didn't have any complicity in the murder, any more than I know that they did. Of course the ineptness of the police plays a role here, but something was always very wrong (beyond the murder itself). JMHO