After the war Pemper gave vital testimony at Goeth’s trial in Poland, which resulted in his execution in 1946. In his memoirs, published in 2005, Pemper recalled occasions when “I would sit in the commandant’s office and take dictation from him. While he talked, Goeth would watch the mirror outside his window, which he used to oversee the area in front of the barracks. Suddenly he would stand up, take one of the rifles from the rack on the wall and open the window. I would hear a few shots and then nothing but screams. As if he had interrupted the dictation only to take a telephone call, Goeth would come back to his desk and say, 'Where were we?’” So great was Goeth’s dedication to the Final Solution that when he was presented with a list of witnesses at his trial, he reportedly exclaimed: “So many Jews? And they always told us not a single one would be left.’’