Wondering if he would have had access to a concrete supplier.. i'm thinking with the concrete slabs/chunks being that thick, he would have needed SO much concrete.. it looks like it would be a fairly noticeable thing to have a concrete delivery into that yard location, and/or to have been lugging bags and bags of the stuff from his vehicle (from the parking area?) to the tarped location?
i am still so shocked that none of the neighbours, in such close quarters, reported seeing anything, in one way or another. It was interesting re-watching the clip of the police press conference.. at 6:58 the officer explicitly says, "it wasn't a tip". I'm very curious to know what led to their pursuing a search warrant 7 months into the investigation. I guess it could have been so many things which led to the search warrant so long after the fact, without a tip necessarily being called in. I suppose it is even possible that police came to his door to re-question him on something, and noticed an odor and/or saw some recent (perhaps homemade looking?) concrete work.
I know nothing about concrete, and couldn't even begin to estimate how much concrete was needed to cover the area where Shannon was buried.
Given that there was a missing person, and it seemed obvious to some of us that she never left the apartment, it wouldn't surprise me if police were keeping an eye on him, watching his purchases, tapping his phone, and waiting for him to make a move that would justify a search warrant. New concrete in the backyard and a missing wife might have been enough for the warrant.