BBC NEWS Americas Profile: Mark Felt. The man now revealed as "Deep Throat" in the Watergate scandal had a long career with the FBI. This is a look at his biography from the BBC.
From the site:
"Follow the money". This famous phrase has inspired generations of investigative reporters, but its author managed to evade detection for 30 years.
It was one of America's greatest mysteries: Who was the anonymous source who had leaked information about the Watergate scandal that led to the resignation of US President Richard Nixon in 1974?
Mark Felt, a former deputy head of the FBI, has revealed that it was he who made the suggestion that led to the discovery of the link between the burglary at the Democratic National Committee HQ in Washington's Watergate complex in June 1972, and the financing of Nixon's re-election campaign.
For decades, the informant was known only as Deep Throat. He was the shadowy, chain-smoking character played by Hal Holbrook in the hit movie All the President's Men starring Robert Redford and Dustin Hoffman.