I don't. I think it is something much more complicated. Also, there has been no information released that indicates Asha was injured or deceased when she entered the car. And we still don't know why she left the house so early in the morning, what time she left, what should have been in her backpack, who checked out the library book, or who the extra items in her backpack belonged to.Maybe that Asha was the victim of a hit and run by the oldest daughter, and the parents helped cover it up.
Another very important issue is whether the daughter, father, mother, or someone else was driving the green car? Just because it belonged to one person doesn't mean that person was driving it.
I'm, also, wondering if the green car was driven after Asha disappeared or has it been hidden all these years.