Affidavit by Dr. Franciszek Blaha, a Czech Communist inmate at Dachau, which was introduced at the Nuremberg International Military Tribunal
Nuremberg Trial Proceedings Vol. 5
"12. Many executions by gas or shooting or injections took place right in the camp. The gas chamber was completed in 1944, and I was called by Dr. Rascher to examine the first victims. Of the eight or nine persons in the chamber there were three still alive, and the remainder appeared to be dead. Their eyes were red, and their faces were swollen. Many prisoners were later killed in this way. Afterwards they were removed to the crematorium where I had to examine their teeth for gold. Teeth containing gold were extracted. Many prisoners who were sick were killed by injections while in the hospital. Some prisoners killed in the hospital came through to the autopsy room with no name or number on the tag which was usually tied to their big toe. Instead the tag said 'Do not dissect'. I performed autopsies on some of these and found that they were perfectly healthy but had died from injections. Sometimes prisoners were killed only because they had dysentery or vomited and gave the nurses too much trouble. Mental patients were liquidated by being led to the gas chamber and injected there or shot. Shooting was a common method of execution. Prisoners could be shot just outside the crematorium and carried in. I have seen people pushed into the ovens while they were still breathing and making sounds, although if they were too much alive they were usually hit on the head first. "