At the end of 1941, the SS-Sonderkommando leader Herbert Lange recruited Plate to the extermination camp Kulmhof. After the departure of SS-Obersturmführer Herbert Otto in early 1942, Plate assumed the position of acting camp commander until the camp’s dissolution. In this role, Plate was a key figure in the extermination of Jews at Kulmhof. He personally shot members of the Jewish work commando selected for execution.
Hans Staegemeir was forester of the area at Kulmhof extermination camp. He observed the activities of theSonderkommando and shared his experiences with his superior, Forester Heinrich May. Members of the Sonderkommando visited his forestry office to make telephone calls. Staegemeir also had the opportunity to visit the extermination site in the forest camp.
In March 1942, Bothmann assumed the role of commander at the Kulmhof extermination camp, succeeding Herbert Lange in this position.
Heinrich May served as the head of the forestry office in Warthbrücken (now Koło) within the Warthegau region, which included overseeing operations at the Kulmhof Forestry. Between 1941 and 1944, May bore witness to the atrocities committed at the Kulmhof extermination camp.
Lange oversaw the infamous Sonderkommando Lange and subsequently assumed command at the Kulmhof extermination camp. In this capacity, he bore the responsibility for orchestrating the systematic slaughter of both inmates of asylums and Jews within the Warthegau region.