I had been reading another case on here the other day where a child died from a severed pancreas from blunt force trauma. I had googled what kind of trauma results in a severed pancreas and found that steering wheels are often the culprit....so when I read that RC drove with haleigh on his lap that day- this possiblility occurred to me.
It would explain why Haleigh seemed fine when the visitors were there early that evening. Since these injuries don't have immediate symptoms and they are vague, Rc probably went to work as usual, thinking there was no serious damage. Maybe he didn't even mention it to Misty beacuse haleigh seemed fine.
Maybe while Ron is at work Misty see's that Haleigh is beginning to exhibit signs of being unwell. Maybe she's vomitting, which is why MC needed to clean the blanket.
She calls RC at work to tell him, but he says to just take care of it herself and to stop bugging him because he's busy at work. kids are always getting sick- no big deal.
Then Haleigh dies. All misty knows is that it happened on her watch, and she will get blamed for it.She's freaking out.
Now who removed the body is up in the air. Maybe misty got her family members to help????
Perhaps Ron later remembers braking hard, and while it seemed like no bigggie at the time, he realizes that he might responsible for the death, but is happy to let Misty feel the guilt and take the blame.
Rons covering for misty because he feels guilty and Misty covers for Ron because she feels guilty because it happened on her watch.
They dont tell LE about the accident because firstly they didn't realise it was just an accident until later, and because the body had already been hidden , committing an actual crime by doing so.
They decide to stick with the original story of abduction, and marry thinking they they wont have to ever testify against each other if her body was found and they were put on trial.
My gut instinct is that something far more disturbing happened to Haleigh
, but throwing this one out there anyway.
ETA: I'd also like to see the state of the house prior to or at the time of Haleighs disappearance. might check youtube for family vids. It looks spotless in the NG vids, which I doubt was normal.
JMO