[1] Winkelmann passed the state examination in 1913 at the University of Kiel, and on 26 September 1914 he received his licence to practise as a doctor.
Winkelmann described these selections in court:The searches took place on one of the camp streets or in a barrack, but very rarely.
Since Percival Treite and Franz Lucas were busy with the selection for the gas chamber in Ravensbrück, he was the third doctor responsible for the area.
To relieve him, a witness testified that Winkelmann refused to abort her because she violated his medical ethos.
Winkelmann died on 1 February 1947 of the consequences of a heart attack during the first of the seven Ravensbrück trials in Hamburg.