Hofmeyer, as Chief Judge, led the action "criminal case against
Mulka and others" (reference number 4 Ks 2/63) which is also known as
first Auschwitz trial. The trial was held from December 20, 1963, to August 20, 1965, before the District Court at Frankfurt am Main. Originally, 22 defendants were tried during 183 days before court. The trial became known as the "most important West German lawsuit against National Socialist violent criminals". Primarily,
Hans Forester was scheduled to be Chief Judge and Hofmeyer to be his assessor. However, Forester had relatives that had been persecuted in National Socialist Germany. Since conflicts due to probable bias were feared, Forester was excused from the trial in the fall of 1963, and Hans Hofmeyer was made chairman. Hofmeyer's nomination as Chief Judge was a surprise, for in his career until then there were few indications that he might be able to conduct a trial of this dimension, which would, furthermore, be observed internationally. Moreover, he had been a judge himself in National Socialist Germany. But even ideological opponents such as the defence counsel Friedrich Karl Kaul did not find any indications in this to jeopardize the trial. Hofmeyer wanted to prevent the marathon trial the Hessian Attorney General
Fritz Bauer had initiated. From his point of view, such fundamental trials were not feasible and marred the rights of the defendants. Rather, he favoured that they should be divided into several small trials specific for the single accused. Even after the successful end of the trial, he argued resolutely against the conducting of such trials. However, he could not make his point against
Fritz Bauer. For
Bauer, juridical coming to terms with the whole set of facts in the Auschwitz case was the focus. He wanted to investigate as many suspects as possible to elucidate the entirety of offenses in the camp in one or several large trials. With the investigation of the set of crimes, the German public was to be confronted with the National Socialist misdeeds. These differing concepts were voiced again during the reasons for the judgment. At the beginning of the promulgation, Hofmeyer explained: "We are dealing here with a normal criminal trial, may it have such or such a background. The court could only pronounce judgement according to the laws it has evoked. And these laws require, in subjective and objective terms, an exact ascertainment of the precise guilt of an accused". Moreover, the trial was not an Auschwitz trial but a "trial against
Mulka and others." The witnesses' testimonies had deeply impressed Hofmeyer. He concluded the reasons for the judgment, visibly moved, with the words: "There may be certainly some among us who cannot look into the joyful and happy eyes of a child for a long time without thinking of the fear-filled, enquiring and believing eyes of those children that went their way in Auschwitz." == Appraisal ==