I don't want to be a spoiler here, since you've just ordered the book, but in at least one case "Widder (Schiff 21)" vs. "Davisian", British sailors were THOUGHT to be seen running towards their ship's 3.7cm and 2cm AA guns, after her boats had started to lower.
In any case, his trial is controversial, and I think many cases of "I saw this/he saw that", while maybe true, maybe not, were used as gospel in the trial.
Just one man's opinion.
Yes, interesting stuff and as I say, I had certainly never heard of this sort of behaviour by any hilfskruezer captain until I read it in one of the Osprey books.
22nd November 1944 - The British Pacific Fleet is born (temporary avatar changes to commemorate the ships and aircraft). HM Ships Formidable, Illustrious, Victorious