Karl Hermann Frank (24 January 1898 – 22 May 1946) was a prominent Sudeten German Nazi official in the Protectorate of Bohemia and Moravia prior to and during World War II. Attaining the rank of Obergruppenführer, he was in command of the Nazi police apparatus in the protectorate, including the Gestapo, the SD, and the Kripo. After the war, Frank was tried, convicted and executed by hanging for his role in organizing the massacres of the people of the Czech villages of Lidice and Ležáky.