Hello Tom,
I found an entry in my database which could be a match. On the same day, a recce Mustang (labelled as F-6) had been shot-down by 3,7cm Flak in position near Oberkleinich, the aircraft crashed into a swampy area near Hochscheid, Bernkastel area, close to the Mosel river, pilot killed. This should have happened in the afternoon hours.
It is stated that the wingman already had aborted the mission, and that the wreck had been found in 1951. Source: "Vom Feindflug nicht zurückgekehrt", a book of AG Luftkriegsgeschichte Rheinland (a group dealing with the clarification of the fate of missing aircraft and crew in the greater Rhineland area).
The only thing which is not exactly matching is the distance from Metz, which seems to be a bit more than 20 miles, but still to the east.
http://www.viamichelin.de/viamicheli...ure=30/07/2007
(larger picture by clicking on the map with the left mouse button)
Hope that helps
Best regards
Matthias Radu