sorry for mentionning hints that were known before.
see the following report of a priest:
http://spengler.li/otto/bericht_dekan_rothermel.htm
this is the best description of what had happened in the last days
somehow the region was regarded as secure.
even train repair from Saarbrücken was removed into our area.
Riediger (we could contact his family) was Flumann employee.
Flumann produced parts for Messerschmitts in Wertheim and or Kreuzwertheim.
The Erla hint, Riediger shall have flown/tested in Wertheim a Messerschmitt with typical Erla parts.