Photograph of German government official Wilhelm von Ketteler. Von der Decker was murdered in 1934 by the Gestapo during the "Night of the Long Knives". Ketteler was slain four years later in 1938.
Picture taken by ? von der Decker
Scanned from the book "Erinnerungen eines Hochverräters" (Memoirs of a traitor) by F.G. Tschirschky