In 1995, Joachim Hoffmann served as an expert witness in a court. Wigbert Grabert published the anthology Grundlagen der Zeitgeschichte by Germar Rudolf, a Holocaust denier convicted of Volksverhetzung (incitement of the people), under his pseudonym "Ernst Gauss". Grabert was charged with this. Hoffmann prepared an expert opinion for Grabert's trial. The district court of Tübingen had the anthology confiscated for Holocaust denial and sentenced Grabert to a fine.Tübingen District Court Az. 4 Gs 173/95 Rudolf published Hoffmann's opinion in 1997 in the Holocaust-denying journal Vierteljahreshefte für freie Geschichtsforschung (VffG).
