Did some further digging on (Dutch) websites. Found a reference on
https://studiegroepluchtoorlog.nl/wp...-1940-1945.pdf
The NA-64 crash is described here and it very much appears that this is the "Storch" crash. It transpires that Uffz. Wehnert, the killed pilot, was on an unauthorized flight with a passenger.
Regrds,
Leendert