I doubt he checked into a will, but as far as I know, the previous owner didn't have any relatives. I believe he bought the house from the government. It would be a moral dilema ( for some of us at least, probably not for my friend) if there were relatives involved, but possession is 9/10ths of the law..... just as people have been known to purchase an old trunk at auctions, only to discover it contains some sort of treasure, or those odd cases where a valuable painting is purchased at a lawn sale from some unknowing seller .... don't have to return the item. I would think the new owners of a house acquire possession of anything that's left behind in said house ... especially if the previous owner is dead. I try to be a moral person, but if I ever bought a house from a dead guy and found $100,000 hidden in it, I wouldn't go too far out of my way to get rid of it.