What I don't understand is why no one will let anyone search the basement of that house in question? If I lived in that house I would be more than fine with LE coming in to conduct a search...but then again I wouldn't have anything to hide. Hasn't the house been sold and changed owners over the years? I don't see why the current owner won't let LE conduct a search. If it was my loved one missing I would have already made my way into that house by now.
If LE truly felt the place was suspicious than they would. However (just like with the A-Frame) this is entirely Fred Murray's initiative to look into this place further. Fred has a habit of basing leads off of rumors rather than solid facts and the police can't go around digging every rumor up that is out there.