The charge was that Tesch, "at Hamburg, Germany, between 1st January 1941, and 31 March 1945, in violation of the laws and usages of war, did supply poison gas used for the extermination of allied nationals interned in concentration camps, well knowing that the said gas was to be so used" in violation of Article 46 of the Hague Convention of 1907. One of the witnesses called by the prosecution was SS Rottenführer Perry Broad, who had worked in the political department in Auschwitz. Tesch and Weinbacher were condemned to death; Drosihn was acquitted. Tesch was executed by hanging on 16 May 1946, by Albert Pierrepoint in Hameln prison.