Trial of the Major War Criminals Before the International Military Tribunal. Volume V. Nuremberg: IMT, 1947. p. 199.

[…]

HERR BABEL: How then did you have an opportunity of observing such ill-treatment?

BLAHA: I performed many autopsies on people either shot or beaten to death at their work, and made official reports on the cause of death.

HERR BABEL: You said they were shot. Did you see such incidents yourself?

HERR BABEL: Then, how do you know that?

BLAHA: The bodies were brought to me from the place of work, and it was my duty to ascertain the cause of death; that the men had been beaten to death, for example, that the skull or ribs had been fractured, that the man had died of internal hemorrhage, or that he had been shot; I had to make an official report on the cause of death. Sometimes, but this was rare, when an investigation was conducted, I was called in as witness.