Hans-Dieter Mundt
… Intelligence work has one moral law–it is justified by results. Even the sophistry of Whitehall paid court to that law, and Leamas got results. Until Mundt came.
It was odd how soon Leamas had realised that Mundt was the writing on the wall.
Hans-Dieter Mundt, born forty-two years ago in Leipzig. Leamas knew his dossier, knew the photograph on the inside of the cover; the blank, hard face beneath the flaxen hair; knew by heart the story of Mundt’s rise to power as second man in the Abteilung and effective head of operations. Mundt was hated even within his own department. Leamas knew that from the evidence of defectors, and from Riemeck, who as a member of the SED Praesidium sat on security committees with Mundt, and dreaded him. Rightly as it turned out, for Mundt had killed him.
The Spy Who Came In From The Cold by John LeCarré, pp.8-9. (emphasis added.)