Hmm.....”because he said so” seemed to be good enough for you when you were asked how Brennan knew that the person crouched down behind boxes aiming a rifle was the same person he saw earlier on a windowsill.
What has that got to do with the price of fish? Brennan saw the same guy in the same window twice within several minutes, what's so hard to believe about that? Out of the scores of windows in the buildings surrounding Brennan he just happens to pick the one window which has Oswald's prints on the recently moved rifle rest, shells from Oswald's rifle and on the same floor Oswald's rifle is found with Oswald's prints. So it was either Oswald or it was some massive still unproved conspiracy. Btw don't bother a point by point rebutal that only contains unconnected liars because that's just stupid!
Here's what has to be Brennan looking up at Oswald's sniper's nest.
Anyway, getting back on track there is no need to speculate what McClelland could see because we have photos which conclusively show that it was possible for McClelland to look
DOWN into Kennedy's head wound.
JohnM