Morris Libau was a German immigrant resident in the United States during World War II. Libau was a "walk-in" to Soviet intelligence, who volunteered information on the eastern front in 1944. The KGB turned Libau over to Soviet Military Intelligence GRU.
Morris Libau is referenced in the following declassified Venona decrypts:
602 KGB New York to Moscow, 2 May 1944; 982 KGB New York to Moscow, 12 July 1944.
- John Earl Haynes and Harvey Klehr, Venona: Decoding Soviet Espionage in America, Yale University Press (1999).