A. J. Hackl, Captain in the U.S. Army | Los Angeles Museum of the Holocaust
Name: A. J. Hackl, Captain in the U.S. Army
Historical Note: Captain A. J. Hackl acted as an investigating officer at Mauthausen Concentration Camp in 1945 after the liberation of the camp.

 A. J. Hackl, Captain in the U.S. Army
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