QP: I could have answered on other forums, but PPRuNe is my preference as so many here are helpful.
Have you seen this website?
Die Luftwaffenhelfer von Köln
You can translate the page from German if preferred.
It refers to an anti aircraft site that was bombed on 24/25 December and mentions ND388.
More specifically it states that a Lancaster crashed onto their airfield/AA site and in the rear turret was a dead body... and that he saw the papers of a 22 year old Canadian.
CWGC is playing up tonight but although there were 23 RCAF killed that night, I know Krewenchuk was 22.
He then includes a photo of Krewenchuk's headstone.....
Also please note I made a mistake in the Lanc serial of the 2 other aircraft, it should have been N
G297, not ND297. Apologies if any problems caused.