My feeling since the beginning was that she may have been abducted by somebody in the black market baby racket. Question is, if that is the case, would they let her go after the baby was delivered?
They examine the object, which turns out to be a body, and they discover that it is Laci, BUT the body has only been there 3-4 days. This could be one way to frame a person. With all the news and announcements from Scott about where he was fishing ANYONE could dump a/the body.
Still hoping the hubby is innocent.