He was sent to the Eastern Front, but due to various illnesses and stays at military hospitals he was posted to Auschwitz in 1941.
Using all their strength, Kaduk and the other Rapportführer trod on the prisoner's ribcage with the heels of their boots — according to the declaration of the court — until his ribs cracked.
"[4]Historian Andrew Roberts in his book The Storm of War recounted Kaduk's practice of handing Jewish children balloons just before they were murdered with a phenol injection to the heart at a rate of ten children per minute.
[3] In 1947, a Soviet military tribunal sentenced him to 25 years of hard labour, but he was released in April 1956.
Despite his violent reputation at Auschwitz, he earned himself the nickname "Papa Kaduk" among patients.
[9] In July 1959 Kaduk was again arrested and appeared in the Frankfurt Auschwitz Trials where he was one of the main accused.
[3] Because of the gravity of Kaduk's deeds, the responsible Spruchkammern rejected various pleas for clemency.
While in prison, Kaduk was interviewed as part of a TV documentary about SS men stationed at Auschwitz.
When asked about Holocaust denial, Kaduk says: (Interviewer) Today there are many people that say Auschwitz was a lie, that nobody at all was gassed.