Treblinka trials

[2] Hirtreiter could not be shown to have been criminally involved at Hadamar; however, he did confess to having worked in a camp near the Polish village of Małkinia where Jews were killed in a gas chamber.

Further investigations showed that Hirtreiter had been stationed at the Treblinka extermination camp, where he supervised the victims' disrobing prior to their gassing.

[3][4] The crimes committed in the General Government territory of occupied Poland were investigated by the Central Agency from July 1959 by the German specialist in the Nazi prosecution Dietrich Zeug, present at the Eichmann trial.

More than 100 witnesses were called, with incriminating evidence presented by Franciszek Ząbecki, a dispatcher employed by the Reichsbahn during the Holocaust train departures from across occupied Poland, proven by original German waybills he collected.

Stangl had previously assisted in killing handicapped people during Aktion T4 (the Nazi "euthanasia" programme), and, before moving on to Treblinka, had been the first commandant of Sobibor.