I really doubt she was secured in the hatch. Per my previous
post 1003:
For me, he was trying to see if he could locate a body and would only mentioned seeing shoes if they were on her. Once he saw them he moved to the opposite end of the window of where shoes (on feet) were. Why mention things in the car? He hadn't said "I see a Truly can, some paraphernalia, a brush, a phone charger, etc". He wasn't giving inventory, he was looking to see if he could see her body.
ETA - the above wasn't the post I was looking for. D'oh! It was
post #989 below...
she could have had the cover open or closed. If closed, and she was under it (inside the trunk area), the diver would not have been able to see her when he peered through the window. He'd have seen the top of the cover. So due to that, she was either on top of the cover (IOW... roof on the bottom of the lake bed, then Kiely, then the closed cover (if it was closed), and then the trunk space. Or the cover was open to store stuff, or whatever. So the above "IOW scenario" minus the cover in-between.
Again, IMHO, if he saw her through the rear window, she was laying on the roof and NOT under the trunk cover.