According to the autopsy he was shot FROM ABOVE which means that either 1.- the cop got on top of the car and jumped so he could shoot a 6 foot plus robber in the top of the head or 2.- the robber was charging at the cop in a football tackle stance (which just FYI is consistent with every wound on Brown).
Rather than dissect all of your diatribe, we can simply start with the initial faulty premise.
The autopsy claims there is a bullet entrance wound in the vertex of his scalp. That's the back side of the top of your head. The bullet came to rest in the right side of his face. That means the bullet traveled from the upper rear of his head towards the front of his face.
Now, somebody who argued like you do would claim this meant he was shot in the back of the head while walking away - but bullets can do crazy sh** when they enter a body. It certainly DOES mean that your stupid assertion that being shot in the top/rear of you head means you had your head down charging like you were in a football stance is incredibly unlikely (for many other reasons as well - people don't run in a
football tackle stance
- you can't, you start off in that stance. You can't run like that unless you like staring at the ground and being bent over at the waist.)