J. Edgar Hoover the Director of the Federal Bureau of Investigation from 1924 to 1972.

J. Edgar Hoover was an American law enforcement official who served as the first Director of the Federal Bureau of Investigation (FBI) from 1924 until his death in 1972. Hoover was known for his strong personality and his controversial leadership of the FBI, which he transformed into a powerful and influential organization.

It is not clear how J. Edgar Hoover would be specifically relevant to the field of psychology. Hoover's leadership style and personality might be of interest to psychologists studying leadership or personality traits, but his work as a law enforcement official would not typically be considered within the scope of psychology.