Yes looking back now I believe le knew all along she wasn't alive, I remember the last update before she was found was something along the lines of they have an idea of what's going on its just putting the pieces together, so what we now know they knew is they found blood and he had enquired about a rug, that in itself speaks volumes, yes not enough to act on but would give you an idea, but I'll bet they still have more. Even in regards to that car they towed back in january, may have been evidence in that.