Great. Here Chazan is saying the murder weapon could be swept from the room after a gassing. Remember, he is an eyewitness so he said he saw and done this:
[Greif] Did the grid column through which the gas was dropped reach all the way down to the floor?
[Chazan] Nearly to the floor. One had left a space which made it possible to clean there. One poured water out and brushed up the remaining pebbles.”
G. Greif, Wir weinten tränenlos… Augenzeugenberichte der jüdischen “Sonderkommandos” in Auschwitz, Böhlau Verlag, Cologne/Weimar/Vienna 1985, p. 237.
I challenge Bombsaway's claim that there are no material contradictions between the eyewitnesses and the experts (or the eyewitnesses and other eyewitnesses). Removal of the murder weapon from a crime scene is material by definition.
In Nessie's bank robbery analogy, a bank teller claims to have swept the gunman's gun away after robbing the bank. Bombsaway should retract his statement about non-contradiction of testimony in ways that are material. Here is his claim:
have not seen any testimony from any of these people that contradict orthodoxy in a significant way.