Yeah, I agree... there is no way that Casey could hide a body in the house (basement/attic/etc) without it stinking up the place.
Our neighbor died awhile back (his little backyard met up with our bigger backyard) and they didn't find him for a week or two (I'm thinking it was two weeks). Anyways, you could smell the stink in my backyard even. He didn't have any family, so they auctioned his house off "as is". The new owners had to tear *everything* out and air it out for several weeks before they could even get in there to work again. Really, really gross...