Well, if Shannon had Gus elsewhere in the car, but with her, it doesn't exactly exonerate her that Josie may have snuck off.
I am wracking my brain for a motive.
I can not think of a reason a grandparent would want to kill a grandchild, when simply telling your daughter he has to go would suffice. Jess could have been told, move out with your kids, or send them to dad. The grandparents were not forced to care for them, the parents were.
Covering up any kind of accident also doesn't make sense, either on the part of the person who caused the accident or the person who knows who caused the accident but doesn't say. And, since LE has drawn a circle around the grandparents, it does not make sense for either of them not to tell Jess what happened (Gus ate poison? I thought he left the hot car but he fell asleep?) and instead hide the body and make up a story.
Attention doesn't jibe with the private behavior of the family; they show no signs of likening being the victim of losing a child for all to see.
A child is expensive, but is not the grandparents' bill, and if the money stressed them out, again they could not allow Gus to live there.
Would it have been stressful for him to start school? Would transportation be a chore/expense issue? IDK the outback parenting life, but if a school age child is hard, again, the grandparents could have bowed out of solving the problem.
I can't get to a motive.
MOO