Despite the fact that the case was closed, Bästlein was sent to the concentration camp in Esterwegen and in 1936, to Sachsenhausen, where he met Robert Abshagen, Franz Jacob, Julius Leber, Harry Naujoks, Wilhelm Guddorf and Martin Weise.
Then Esterwegen served as a British internment camp, as a prison, and, until 2000, as a depot for the German Army.
Gustav Hermann Sorge (April 24, 1911, Rydzyna, Silesia – 1978, Rheinbach, prison), nicknamed "Der eiserne Gustav" (The Iron Gustav) for his brutality, was an SS-Hauptscharführer and a guard at Esterwegen concentration camp in the Emsland region of Germany prior to being assigned to Sachsenhausen concentration camp.
She was arrested there when she enquired how to obtain new identity papers and she was then held by the British Army at Esterwegen Internment Camp, the former Esterwegen concentration camp, where she was interrogated.