It is very, very sad to hear she's likely to have been found.
IMO, 'inaccessible place' hints, maybe, at a fall from somewhere relatively high and difficult to get down to. She could maybe be seen from this height, but not clearly enough to tell much about the body.
I don't think anyone else has anything to do with it moo but we'll find out in due course. I really don't feel the hints that anyone knew about it or had anything to do with it. Again, moo.
Whatever happened, however it happened, it is heartbreakingly sad for the family.