Friedrich-Paul von Groszheim, born in Lübeck, Germany was an ordinary German man who was imprisoned by the Nazis for the (then) crime of homosexuality.
Von Groszheim was one of 230 men arrested in Lübeck on suspicion of being gay by the SS in January 1937 under paragraph 175, which outlawed homosexuality. He was imprisoned for ten months, during which he had to wear a badge emblazoned with a capital A, for Arschficker (arse-fucker):
They beat us to a pulp. I couldn't lie down...my whole back (was) bloody. You were beaten until you finally named names.
Von Groszheim was held in a cell with no heating, very little food, and no toilet facilities. He was rearrested in 1938 and tortured. Von Groszheim was eventually offered the 'alternative' of castration or Sachsenhausen concentration camp. He 'chose' castration. Terrible as it may seem, it was a decision that probably saved his life. He was then released.
Because of the castration, von Groszheim was rejected as physically unfit for military service in 1940. In 1943 he was arrested a third time, this time as a supporter of the former Kaiser Wilhelm II, and imprisoned as a political prisoner at Neuengamme concentration camp.
After the war, he settled in Hamburg.
Von Groszheim was never acknowledged as a victim of the Nazi regime, and due to on-going persecution of homosexuals in Germany, it took nearly half a century before he broke his silence. Eventually he explained why he began to speak out: 'I'm living proof that Hitler didn't win. I'm aware of that every day. If I don't tell my story, who will know the truth?.' He only told his story in 1992, on We Were Marked with a Big "A", a film in German with English subtitles.
*I can find nothing to indicate when Friedrich-Paul von Groszheim died, but as he would now be over 100 years-old I can only assume that he is no longer with us - but his memory is important.