W. Mark Felt
Felt and Edward S. Miller, "convicted of authorizing illegal break-ins during the Nixon years", were pardoned by President Ronald Reagan, who claimed "they served the nation 'with great distinction'. (4/15/1981)." 
Vanity Fair Interview
Now 91, Felt "says he was the source called Deep Throat who leaked secrets about President Nixon's Watergate coverup to The Washington Post. ... [Felt] kept the secret even from his family until 2002, when he confided to a friend that he had been Washington Post reporter Bob Woodward's source," Vanity Fair reported Tuesday, May 31, 2005. 
Read the Vanity Fair Press Room Advance Copy of "I'm the Guy They Called Deep Throat."
In July 1999, David Daley of the Hartford Courant "found W. Mark Felt, the former FBI associate director believed by the late Richard Nixon and various other people to have been Deep Throat." Daley asked Felt, then 85 and living in California, if he was "Deep Throat," to which Felt replied:
- "'No, it's not me, ... I would have done better. I would have been more effective. Deep Throat didn't exactly bring the White House crashing down, did he?" 
"Mark Felt: The former FBI official is considered a leading candidate. White House tapes from 1972 recorded Nixon aide H.R. Haldeman telling the president that most of the leaks were coming from Felt. Also, the Hartford Courant newspaper reported that a 19-year-old it interviewed in 1999 said Bernstein's son Jacob had told him that Felt was Deep Throat. Bernstein and his ex-wife, Nora Ephron, deny he ever told his son." CNN, June 17, 2002.
- W. Mark Felt at namebase.org.
- James Mann, "Deep Throat: An Institutional Analysis," The Atlantic Online, May 1992.
- Timothy Noah, "Deep Throat Revealed (Again)," Slate, June 17, 1999.
- Timothy Noah, "Deep Throat Revealed (One Last Time)," Slate, June 24, 1999.
- Timothy Noah, "Deep Throat: The Game Is Afoot," Slate, July 19, 1999.
- Timothy Noah, "Another Bulletin From the Deep Throat Desk," Slate, July 26, 1999.
- Timothy Noah, "The Final Word on Deep Throat (So Far)," Slate, August 9, 1999.
- Amy Reiter, "Gulp! Deep Throat disclosure hard to swallow," Salon, August 18, 1999.
- "The Unmasking of Deep Throat," The Washintonian Online, 2002.
- John McCaslin, "Beltway Beat: Deep Throat?" TownHall.com, May 3, 2002.
- Chris Coursey, "'Deep Throat' mystery points to SR man," PressDemocrat, May 8, 2002.
- Catherine Fitzpatrick and Jan Uebelherr, "Likely suspects. Thirty years later, the world still wonders who 'Deep Throat' was," Milwaukee Journal-Sentinel Online, June 10, 2002.
- Vicki Haddock, "The Bay Area's 'Deep Throat' candidate," San Francisco Chronicle, June 16, 2002.
- "Ex-FBI official: I'm 'Deep Throat'. But Watergate reporter won't confirm, deny story," MSNBC, May 31, 2005.
- "It's Felt!" The Washingtonian, May 31, 2005; includes 1974 article "If It Isn't Tricia It Must Be..."
- William Neikirk and Mike Dorning, "President called Felt a `traitor' in '73," Chicago Tribune, June 2, 2005: "Nearly 15 months before his 1974 resignation, President Richard Nixon described W. Mark Felt as a traitor who should be required to take a lie detector test, according to previously undisclosed tapes of White House conversations stored at the National Archives."