Koppe and SS-Sturmbannführer Herbert Lange proceeded to manage the problem by experimenting at a country estate at Chełmno nad Nerem with gas vans, establishing the first extermination unit which ultimately carried out the mass murder of approximately 150,000 Jews between late 1941 and April 1942.
The first judicial trial of the former SS men – members of the SS-Sonderkommando Kulmhof – took place in 1945 at the District Court in Łódź, Poland.
Podchlebnik became a key witnesses in 1945 at the Chełmno Trials of the former SS men from the SS Special Detachment Kulmhof.
He testified again about Chełmno in the 1961 trial of Adolph Eichmann in Jerusalem, and in the Chełmno trials in Germany (1962–1965) of the former SS men from the SS Special Detachment Kulmhof.
Chełmno | Ústí nad Labem | Jablonec nad Nisou | Lipno nad Vltavou | Krościenko nad Dunajcem | Hluboká nad Vltavou | Chlumec nad Cidlinou | Chełmno nad Nerem | Suchdol nad Odrou | Předměřice nad Jizerou | Kralupy nad Vltavou | Kostrzyn nad Odrą | Dobrzyń nad Wisłą | Czerwińsk nad Wisłą | Brandýs nad Labem-Stará Boleslav | Bjarne Nerem | Bílovice nad Svitavou | Žďár nad Sázavou | Žabokreky nad Nitrou | Vranov nad Topľou | Vojka nad Dunajom | Ústí nad Orlicí District | Ústí nad Orlicí | Týnec nad Labem | Svatý Jan nad Malší | Strunkovice nad Volyňkou | Strunkovice nad Blanicí | Solec nad Wisłą | Šentjošt nad Horjulom | Rubredoxin—NAD(P)+ reductase |