 Reputedly the letter was largely written for him by an official named Dmitri Sukhanov, who ran the private office of Georgi Malenkov.Stalin's reaction was to promote Ryumin to head of the Department for Specially Important Cases, and to dismiss Abakumov, who was arrested.Ryumin then handled the investigation of the so-called Doctors' Plot, until he was abruptly sacked on 13 November 1952, apparently because Stalin had decided that he was too incompetent to do the job.