Oskar Hoffmann (4 July 1877 â 3 February 1953) was a German editor and politician. He served in the Landtag in North Rhine-Westphalia and was a member of the Social Democratic Party of Germany. After the war, he became a member of the Communist Party. He was arrested in 1933 and for one month, was held at Kemna concentration camp, where he was tortured physically and psychologically.