Game,set and match to the cop.And that might even apply to any civil suit that's filed...and we all know that *that's* gonna happen.
Lowering the head and body slows down the runner and provides the least amount of vision.
The only time one would lower the head and body would be at the last moment of contact, within a few feet of the person you are trying to block or tackle.
In order to get a finishing shot on Mr. Brown at the top of the head, it would have to have been at a close range.
Unless, Mr.Brown, in his consistent state of stupidity and rage decided to put his dead down and stumble forward for a extremely odd angle over a sustained distance.