Not to mention that the cop has a busted face and he’s wired up. It takes what it takes to stop the brute force attack of a 6’2” 275lb savage.
The reports that I've seen put Brown at 6' 4" and over 290 pounds.
Definitely a very large "kid".
If Brown actually would not stop and charged the officer after seeing the pistol aimed at him, he was either very loaded, or wanted to die...or just so possessed that he didn’t care.