I am trying to remember an old movie which I believe was out in the 70's. The plot is a man dies and at his wake he tells his inheritors that his wealth is hidden in his house. As the inheritors search for his legacy, they are killed by booby-traps in the house. In one scene a person finds a hidden panel, crawls in and the door shuts behind them, sealing them in forever.This is driving me nuts. Any help would be greatly appreciated.
