MACR 7438 for this crash can be seen here:
https://catalog.archives.gov/id/91033546
However, there is an interesting statement here about Edwin Ball, by Jim Starnes. (Search for BALL.)
http://339fg.s3.amazonaws.com/news/V...021%20%232.pdf
"Edwin C. Ball (505) was lost on Aug. 8, 1944 while strafing a train in Northern France.
Although the witness statement by George Knight states they were near Roulers, Belgium,
his body and the aircraft wreckage were found well inside French territory. Ed Ball was one of our original pilots in Dick Olander's flight with me, and one of our original pilots. His bed was next to mine in our Nissan Hut at Fowlmere. I was not on that mission but wrote his widow what few details were known on Ed’s loss. There was no parachute. She wrote back for more details, but there was little I could add. "
This link gives the crash site as Wasquehal (a suburb NE of Lille, France).
http://francecrashes39-45.net/page_fiche_av.php?id=7896