Guenther Reinhardt (1904 – 1968) was a German-American writer and investigator, best known for his book Crime Without Punishment: The Secret Soviet Terror Against America (1952).
One of his best sources was Boston Globe reporter Gardner Jackson, who told Reinhardt (based on hearsay from Stanley Reed and Jerome Frank) that J. Edgar Hoover was a "queer.
He served as an interpreter during the Nuremberg Trials (1948-9)[1][3] In 1949, Reinhardt became a private investigator for Bartley Crum, a San Francisco lawyer and co-publisher of the New York Star through 1959.
[3][13][14][15] In 1964, Reinhardt was arrested for stealing documents from the New York State Liquor Authority to sell to detectives who were posing as "underworld agents."
Through his work with the FBI and the U.S. Counterintelligence Corps, he has amassed a tremendous knowledge of the secret world of espionage and subversion which few Americans ever glimpse.
[3] Author David L. Robb described Reinhardt in 2012 as: Cut from the Sam Spade school of private detecting and the One Flew Over the Cuckoo's Nest school of personal behavior, Reinhardt was a bipolar Don Quixote, a manic-depressive knight errant in search of adventure and a fast buck.
[3] In his best known work, Crime Without Punishment (November 1952), Reinhardt recounts several cases related to Soviet espionage in the United States, including the death of Juliet Stuart Poyntz (for whom his major source was Ludwig Lore), Arkadi Maslow, Leon Trotsky, Otto Ruhle, Horst Berensprung, Ellen Knauff, and Karl Nierendorf.
[5][7] Reinhardt objected to points made by New York Times reviewer John H. Lichtbau (also a former colleague in the Counterintelligence Corps in Germany).
To the criticism that Karl Nierendorf's name goes unmentioned in authoritative accounts on German communism, for example, Reinhardt retorted that of course the name did not appear openly because "I deal with secret agents.