Otto Kirchheimer (German: [ˈkɪʁçˌhaɪmɐ]; 11 November 1905, Heilbronn – 22 November 1965, Washington, D.C.) was a German jurist of Jewish ancestry and political scientist of the Frankfurt School whose work essentially covered the state and its constitution. Kirchheimer worked as a research analyst at the Office of Strategic Services (OSS), the forerunner of the CIA, starting in World War II and continuing to 1952. Source: Wikipedia (en)