Mark Felt was the FBI agent who leaked the information about the Watergate break-in to Washington Post reporters Bob Woodward and Carl Bernstein.
Their articles revealed that Nixon staffers authorized the break-in at the Democratic National Committee Headquarters at the Watergate Hotel in Washington.
Deep Throat's identity remained a secret until Felt unveiled himself in 2005.
Felt was 95 years old.
'Deep Throat' dies in Santa Rosa
SANTA ROSA, CA