RIAS report on the murder of Heinz Schöneberger on Heinrich Heine Strasse (interview with eyewitnesses, statement by Ernst Lemmer, the special envoy of the West German Chancellor in Berlin), 27 December 1965 (in German) (Source: Archiv Deutschlandradio, Broadcast: Die Zeit im Funk, Reporter: Helmut Fleischer, Gerd Meyer, Gerd Hente)