The Tesch trial was a British military tribunal in Hamburg on March 1–8, 1946. It involved a pest control company, Tesch & Stabenow (called Testa), which was a major supplier of Zyklon B, a pesticide which is claimed to have been used during the Holocaust.
The main defendant was Bruno Tesch, a German chemist, co-inventor of Zyklon B, and the owner of Tesch & Stabenow. His two co-defendants were the firm's registered general representative Karl Weinbacher and the firm’s first gassing technician Joachim Drosihn. Tesch and Weinbacher were sentenced to death for supplying Zyklon B, despite allegedly knowing that it was used for killings. Drosihn was acquitted.
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