A few things that have me thinking along the same lines:
IF a person was to take VS (or even had hid on the property waiting for VS) where are their footprints?
We know that the road has dirt by being told they found prints of a tire tracks.
Why is there only ONE footprint that we see on the news? Is this print close the edge of the driveway? As if she could have slipped getting into the passenger seat of that truck?
I understand her parents are hurting inside. Yet, my mind is telling me there is something missing from this puzzle. Could VS have just walked away without telling her parents of the plan? She seemed to be getting some ducks in a row. As LM told NG "...she had just won temporary custody a week ago and took out a Will 3 weeks ago." And yes, I also wonder if there was a life insurance policy taken out around time of the Will.
They tell us that she was struggling...my mind wonders why there isn't another set of footprints. Perhaps this is why the conflicting reports on VS leaving her children.
IIRC early on they said DS had both vehicles in VA to begin with, before this happened.
Even if VS had a set of keys to the truck, how would she have gotten to VA to take it if she had coffee with her mother early Monday morning.
Also, you have a neighbor that said she saw a man bent down behind a truck that looked like DS's truck that morning and tire tracks that are similar.
IMO the getting the custody, writing a will, and taking out a policy (if she did) shows a woman who was scared to death of her estranged husband. She wanted to get the kids away from him, and she did. If she thought he would try to kill her, she would want a will and insurance for her girls' benefit.
Wasn't the one footprint on the tank? The driveway is gravel and they said it was disturbed like a struggle may have taken place, but there would be no footprints in gravel.
I just don't think VS did this to herself. I think she is deceased and DS did it or hired someone to do it. I think he thought an alibi would stop all speculation of him and it would be over.
Maybe he did hire someone to do it, and he let the guy use his truck and the guy just didn't care enough to get rid of everything like he should have. By the time the truck made it back, it was too late to clean it out because DS was being investigated.
There is a reason he has not been cleared, even with his "alibi". And as we all know, alibies fall apart.