Okay: That three empty cartridge cases were allegedly found by the so called snipers window.
I'll assume that you have used the word "allegedly" because there is good reason to doubt that there were THREE shells there when Mooney first discovered the shells.... And yes, I know that it is widely accepted that there were THREE shells there, but there is also evidence that indicates there were only TWO spent shells....And all of the documents that originated in the TSBD that afternoon state that there were TWO spent shells found.
Assume what you must if it helps you get to wherever you're aiming.
And note that I quoted Freeman verbatim. He couched the question like that, not in a way that takes a conflicting position.
And call me whatever you want. I don't mind.