Höhne, Heinz (2000). The Order of the Death's Head: A History of the SS. Penguin Books. ISBN9780141390123. The author notes the irony that the SS prosecutor, Konrad Morgen, investigated some cover-up murders of inmates in detail while being ignorant of, or willfully ignoring, the industrialized mass murder later alleged to have been going on in the camps further to the East.
