Professor Maximinus Friedrich Alexander de Crinis (29 May 1889 – 2 May 1945) held a chair in psychiatry in Cologne and at Charité in Berlin, and was a medical expert for the Action T4 Euthanasia Program who wrote the Euthanasia Decree, signed by Adolf Hitler on 20 September 1939.
Not only was de Crinis a high-ranking SS member,[1] he was the most outspoken and influential Nazi in German psychiatry, a psychiatric consultant at the highest level of the regime.
De Crinis became medical director of the Ministry of Education in 1941.
Furthermore, he politically supported fellow Nazi Max Clara's attempts to obtain professorship at the University of Leipzig.
[1] According to Heinz Guderian, Dr De Crinis was the first doctor to correctly diagnose Hitler's malady as being Parkinson's disease.