A Brief History of Critiques of the Leuchter Report 20 3. An Engineering Report on the Alleged Execution Gas Chambers at Auschwitz, Birkenau, and Majdanek, or seriously considered to function as execution gas chambers.” Subsequently, this first “Leuchter Report” was the target of much criticism,. some of it The Leuchter Report claims to prove that the gas chambers at Auschwitz-Birkenau did not exist. How do we know that this report is not scientifically sound?In fact, the causes of these discrepancies include the different time periods for exposure to hydrogen cyanide in the disinfection chambers and the gas chambers