Kaltenbrunner argued in his defense that his position as RSHA chief existed only theoretically and said he was only active in matters of espionage and intelligence. He maintained that Himmler, as his superior, was the person culpable for the atrocities committed during his tenure as chief of the RSHA. Kaltenbrunner also asserted that he had no knowledge of the Final Solution before 1943 and went on to claim that he protested against the ill-treatment of the Jews to Himmler and Hitler. Further denials from Kaltenbrunner included statements that he knew nothing of the Commissar Order and that he never visited Mauthausen concentration camp, despite documentation of his visit. At one point, Kaltenbrunner went so far as to avow that "he" was responsible for bringing the Final Solution to an end.