one of the things i suggest to the president is that it's very likely that the cover-up is going to blow. i said i don't know who's going to go, who is going to blow. i tell him mccord, for example. mccord was worried. >> mccord decides he's going to blow the whistle. >> this was supposed to be the finale for the seven watergate defendants the day of sentencing. but instead the case broke wide open again. >> mccord wrote judge sirica a letter. in it he says other people not yet named were involved in the break-in at democratic national headquarters. he says the political pressure was brought on defendants to plead guilty and remain silent. he says there was perjury in the trial testimony. >> the letter he released in sirica's courtroom was clearly his last-ditch effort after he had been convicted. >> he did not know that much, but he knew enough to know it went higher and that the trial