INTERNET SOURCE: https://en.wikipedia.org/wiki/Lothar_Kreyssig
Lothar Kreyssig (October 30, 1898 – July 6, 1986) was a German judge during the Weimar and Nazi era. He was the only German judge who attempted to stop the Action T4 euthanasia program, an intervention that cost him his job. After the Second World War, he was again offered a judgeship, but declined. Later, he became an advocate of German reconciliation and founded the Action Reconciliation Service for Peace and the German development aid non-government organization, Action for World Solidarity.