Theres some real possibilities here, i think the church yard/vaults definitely need to be checked out, very good idea calikid! Im also very interested in the cliffs and caves around the area - we discussed before and (i think) a portuguese poster had said that there were plenty of places there that would be easy to hide a small body. I think the refrigerator, for me, is out, most appartments in EU only have a small freezer section (a couple of drawers in the top or bottom of the fridge), even with a separate freezer, it would not have been a chest freezer (Concur with Edward20 here) so i dont think it would be big enough.
just my 2 cents, got a couple more, but trying to work in my head first!