As the face of law enforcement in America during 1935-1972, J. Edgar Hoover was feared and admired, reviled and revered. But behind closed doors, he held secrets that would have destroyed his image, his career and his life. His critics have accused him of exceeding the jurisdiction of the FBI. He used the FBI to harass political dissenters and activists, to amass secret files on political leaders, and to collect evidence using illegal methods.
Stig Björne
Source: IMDB and Wikipedia