William Mark Felt, Sr. (August 17, 1913 – December 18, 2008) was a Federal Bureau of Investigation (FBI) special agent who retired as the Bureau's Deputy Director in 1973. After keeping secret for 30 years his involvement with reporters Bob Woodward and Carl Bernstein, Felt admitted to being the Watergate scandal's whistleblower, "Deep Throat," on May 31, 2005.