That massacre is in today's news again because of the plane crash in Smolensk in which the current Polish president and his Polish entourage were all killed--perhaps by accident, but perhaps not.
The Soviet proceedings at Krasnodar and Kharkov are described in The Verdict. http://www.nazigassings.com/PDFs/KrasnodarKharkovtrials1.pdf
From the indictment for the Krasnodar trial on page 49 we have the following:
Medico-legal experts who exhumed and examined bodies found in an anti-tank ditch near Krasnodar stated in their postmortem findings on 29th June, 1943: “The skin, skeletal muscles and mucous membranes of lips, stomach, intestines, pericardium and peritoneum were either a pale pink or bright cherry colour, also noted in some cases in sections of internal organs such as the kidneys, lungs and heart. Spectroscopic and chemical examinations of the blood and portions of organs removed for biopsy showed that in 523 cases out of 623 bodies, death was caused by carbon monoxide poisoning.” As established by the investigation similar “gas lorries,” which were nicknamed “murder vans,” were used by the Germans for murdering peaceful Soviet citizens not only in Krasnodar but also in Kharkov. These vans, as testified by the German defendants in the present case and also by witnesses who witnessed the crimes committed by the Germans, are large closed trucks of dark grey colour, driven by Diesel engines. The vans are lined inside with galvanized iron and have air-tight folding doors at the back. The floor is equipped with a wooden grating under which passes a pipe with apertures. This pipe is connected to the exhaust pipe of the engine. The exhaust gases of the Diesel engine, containing highly concentrated carbon monoxide, enter the body of the van, causing rapid poisoning and asphyxiation of the people locked up in the van.
Diesel exhaust contains hardly any carbon monoxide, even under heavy engine loads. If the engines had simply been idling (no load on the engine) with the vehicles parked as suggested by the infamous unsigned letter from Becker to Rauff in Nuremberg File PS-501, the carbon monoxide levels would have been practically nil and the exhaust gases would have been harmless except for the heat. Death, if it occurred, would NOT have been from carbon monoxide at all.
Friedrich Paul Berg
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Nazi Gassings Never Happened! Niemand wurde vergast!