I don't think I've ever heard it said that IR saw DK alive when they came back from the store. IIRC IR just said that he saw him at the campground, not when.
So IMO something must've happened on the way to or from the store. I said it before and I'll say it again, if it was in fact DK was the filthy crying baby at the store, they may have accidentally disciplined him too far on the way back to the campsite.
I'm starting to wonder if VDK stayed with JM until the 911 call was complete and LE had told them it would be a while before they got there, then he hauled back down the road to cover up evidence and once he was done placed a 911 call to cover why he drove down the road. I still haven't released his 911 caller said what time it was made, so this is definitely a possibility.
What's interesting though is that LE must've given them an estimate of time for them to arrive, there's no way the parents could've known it would take a couple of hours for anybody to get there.
I'm wondering if they weren't in a daze after returning from the store because something happened on the way to or from the store. Then said let's try and play it off and distract IR and GGP and then say went missing. I don't know, the stupid timeline is what makes everything so questionable!
I just know that the tone of voice on the 911 call is not consistent with a mother who just lost her two-year-old. I would've been hysterical. And her demeanor during the interview was absolutely bizarre. His answers and rambling on about the search team and praising them was equally bizarre. In my opinion, they have not acted in anyway consistent with parents who have lost their little boy.