During the initial stages of the Nuremberg trials, Kaltenbrunner was absent because of two episodes of subarachnoid hemorrhage, which required several weeks of recovery time. After his health improved, the tribunal denied his request for pardon. When he was released from a military hospital he pleaded not guilty to the charges of the indictment against him. Kaltenbrunner said all decrees and legal documents that bore his signature were "rubber-stamped" and filed by his adjutant(s). He also said Gestapo Chief Heinrich Müller had illegally affixed his signature to numerous documents in question.