That Chief looks a little befuddled whenever he's in front of the mic.
In the end whether the Cop knew or not is at best a small contributing factor, IMHO. Brown KNEW, and as the surveillance tapes have shown, was big and stupid enough to get physical without a second thought.
Which leaves us at the primary issue of did the Cop overreact? Eyewitness accounts claim enough shots were fired to make it sound like he emptied a clip.
What all parties are asking the Chief for is just the facts — the autopsy, location of bullet holes, bullet trajectories, location of the shell casings, blood spatter ...
Instead he spends a week putting together a report on a robbery charge that he is not going to file because the guy is dead.