The investigation continued under Cox's successor, Leon Jaworski, with Nixon clinging to the presidency until the tapes finally revealed the "smoking gun" of his obstruction of justice. Six days after the break-in, Haldeman told him: "The way to handle this thing is for us to have Walters call Pat Gray" -- that is, Deputy FBI Director Vernon Walters call the acting FBI director. "Just say, 'Stay the hell out of this. This, ah, business here, we don't want you to go any further on it.' " Gray then did as he was told.