The secret informant known as "Deep Throat" in the Watergate scandal was William Mark Felt Sr., the associate director (Deputy Director) of the FBI in the early 1970s. He was the anonymous source who provided key information to Washington Post reporters Bob Woodward and Carl Bernstein during their investigation of the Watergate break-in and the subsequent cover-up. Mark Felt revealed his identity as Deep Throat in 2005 at age 91, after maintaining secrecy for over 30 years. His inside information was instrumental in exposing the Nixon administration's involvement in the scandal, which eventually led to President Richard Nixon's resignation in 1974.
