Correct, my bad. If I recall correctly, forensics said that supported the officer's testimony as well.
Yeah, there aren't all that many scenarios in which you could shoot someone in the top of their head. You basically have to be facing the shooter and leaning - which is pretty consistent with Brown charging at Wilson.
Why don't you just call them out if it bothers you so much?
Personally, that's what I try do. Many people refuse to even discuss it (immediately proposing that we should agree to disagree), some choose to immediately call me a member of the KKK, and the few meaningful discussions I've had ended inconclusively ("Well yeah but maybe he should still be indicted so that the evidence can be reviewed in court", etc.).
If I weren't so stubborn I would agree that it's completely not worth the effort. These people are guided by ideology and blind belief, and rarely adjust their views in light of new information.