Mazuw, the son of a factory worker, was a trained metal worker. In 1918 he voluntarily joined the Navy, and saw service in the First World War. After the armistice, his ship along with the rest of the German High Seas Fleet was interned by the British at Scapa Flow. After the German Sailors scuttled their ships, they were held in English prisoner of war camps. Mazuw was returned to Germany in 1920. He remained in the Reichsmarine until 1921, then worked as a factory worker until 1925. He remained unemployed until 1932, when he worked as a truck driver in Coburg. His 1932 marriage granted him three children. In 1928 he joined the Sturmabteilung and the Nazi Party, changing to join the SS in 1930. He was head of SS-Abschnitt XVIII from November 1933 until the beginning of September 1934, when he subsequently became leader of SS-Abschnitt XIII until April 1936. From 1936, Mazuw was a member of the Reichstag of the Nazi Party from the tenth to the eleventh electoral period for the 6th constituency, Pommern. From April 1936 until the beginning of May 1945, Mazuw was leader of the OstseeSS-Oberabschnitt, and from August 1938 to the end of the same period, he was Higher SS and Police leader in the district Nord, in 1940 renamed Ostsee, with his office in Stettin. Of eighteen HSSPFs in Nazi Germany, Mazuw was the only one who held this position more than five years. From 1940 to 1945 he was Landeshauptmann of the Province of Pomerania. In this position, together with Pomeranian GauleiterFranz Schwede-Coburg, he was engaged in the "Aktion T4" euthanasia action, aiding the dispatchment of some 1,400 mental care clients from Pomeranian sanatories in Stralsund, Ueckermünde, Treptow an der Rega, Lauenburg and Meseritz-Obrawalde to an execution site in Piasnitz, Reichsgau Danzig-West Prussia, where they were shot. Himmler, however, thought that Mazuw was not active enough, and in December 1944 sent him a letter of reprimand. Writer Igor Witkowski has speculated that Mazuw was involved in secret programs to develop a Wunderwaffe, a new type of weapon supposed to change the course of the second world war. After the war, Mazuw was held captive. In 1948 he was prosecuted relating to denazification proceedings, and was sentenced to eight years in prison. On the basis of severely abusing political prisoners and Jews in 1933, he received another -year prison sentence in 1951. He later found employment after his sentence. He died in December 1987 in Karlsruhe.
