Leuchter report

The Leuchter report is a pseudoscientific document authored by American execution technician Fred A. Leuchter, who was commissioned by Ernst Zündel to defend him at his trial in Canada for distributing Holocaust denial material. Leuchter compiled the report in 1988 with the intention of investigating the feasibility of mass homicidal gassings at Nazi extermination camps, specifically at Auschwitz. He traveled to the camp, collected multiple pieces of brick from the remains of the crematoria and gas chambers (without the camp's permission), brought them back to the United States, and submitted them for chemical analysis. At the trial, Leuchter was called upon to defend the report in the capacity of an expert witness; however, during the trial, the court ruled that he had neither the qualifications nor experience to act as such. Leuchter cited the absence of Prussian blue in the homicidal gas chambers to support his view that they could not have been used to gas people. However, residual iron-based cyanide compounds are not a categorical consequence of cyanide exposure. In addition, the walls and ceilings of the gas chambers were covered with plaster. The Prussian blue would have remained on the surface of the plaster and would not have left a substantial presence on the bricks, mortar, or cement beneath. By the time Leuchter arrived at Auschwitz-Birkenau to take these samples, the plaster had long since disappeared due to aging and exposure. By not discriminating against that, Leuchter introduced an unreliable factor into his experiment, and his findings were seriously flawed as a result. In contrast, tests conducted by Polish forensic scientists (who discriminated against iron-based compounds) confirmed the presence of cyanide in the locations, in accordance with where and how it was used in the Holocaust. In addition, the report was criticized as Leuchter had overlooked critical evidence,...