"Yes. I know that Heydrich, in a certain sense, really had something akin to a bad conscience when he committed his crimes. At any rate, he did not like it when those things were discussed openly in Gestapo circles. Nebe, who as Chief of the Criminal Police had the same rank as the Chief of the Gestapo, Mueller, always told me that Heydrich took care to conceal his crimes. With the entry of Kaltenbrunner into that organization, this practice ceased. All those things were now openly discussed among the department chiefs of the Gestapo. By now the war had started, of course. These gentlemen lunched together, and Nebe often came to me from such luncheons so completely exhausted that he had a nervous breakdown. On two occasions Nebe had to be sent on long sick leave because he simply could not stand the open cynicism with which mass murder, and the technique of mass murder, were discussed."