The story about the P-61 shoot-down can be found on this link. Search for 42-51226 on the page.
http://yellowairplane.com/Book_Revie...samerican.html
If you read the posting, the story gets more involved and there is a book referenced which discusses the incident and a cover-up. Has anyone read the book who can comment?
Also discussed on this link:
http://francecrashes39-45.net/recits...s/42-51226.pdf