[Gizmo]

drgondog,
My source for P-51 lost is "D-Day - The Air battle" by K. Delive. See page 124: [Ju 87s]" "Flying in V formation of three-plane Vics, and going westward toward the beach-head and flying on the deck. The formation was bounced, with claims listed bellow. Lt. Douglas was hit by Flak near Calais coming out and missing in action"
Also "Fighter Units and Pilots of the 8th USAAF" by K. D. Miller listing Lt. Walter A. Douglas (357th FS) as a POW, P-51B 42-106862, hit by Flak over Calais and bailed out off the coast. So probably Douglas was shot down by Flak after combat with Ju 87 formation.

BTW -This error on french website linked above, looks like to be result of attack by unfriendly software.