Josef Trajtag was an inmate of the Sobibór Camp. In a deposition of 10 October 1945, he reported from hearsay that Sobibór had one gas chamber, where an unspecified gas was used for killings. After the murder, the floors opened, and the bodies were discharged into carts below, which brought them to mass graves.
His claims are rejected as false by the orthodoxy, who insists on several gas chambers, which did not have collapsible floors with carts underneath. The corpses were instead taken out of the chamber manually, sideways through a normal door.