In 1937, he became a member of the newly-established Reich Research Council that supported "research projects" of the SS, including experiments on prisoners in the concentration camps. As head of the General Medicine Branch of the RRC, he personally approved the funds which financed August Hirt's experiments with mustard gas on prisoners at Natzweiler concentration camp from 1941 until 1944.[1] However he was one of the few University professors who publicly spoke out against the NS-Euthanasia program T4.