I'm a little confused. The ex-wife is living in Powell's house, taking
care of the adult kids. They are ADULTS. Can't they take care of
themselves? Or is she living there so they can all save on resources? That's just weirdly written.
As I recall, one of the adults has developmental considerations. No doubt the
mom would like have some influence on her offspring who have had the negative
influence of the incarcerated dad. After having lived with him all those years,
they need help!
There's a good chance in my opinion. If Steve is released, and is already
sick and twisted in the head. He would visit the site where they placed Susan.
It might be worth tracking him that way, find the body and return her to her
parents. And charge Steve with his contribution or murder of Susan.