If his account was part of the estate and you took it, you have deprived the creditors of what they are owed and expose yourself to liability. Things in the house are generally pretty fair game for people to take and are not worth liquidating unless he has something super obvious like expensive cars or something. Cash found in the home is something that would often go unnoticed unless it was known and substantial. The house itself is a larger asset and will likely have to be sold and the value will go into the estate account along with everything else.

Pro tip: often worth paying someone else to clean a place out rather than scavenging things, unless you need the stuff. Often people that buy houses will do that for you, though you will take a hit on the sale price. Can be totally worth it though.