You have hit upon the most important question of all. Was Blake carrying a weapon? Or was there a weapon in his car?
If the answer to either question is yes, then this was probably a good shoot (not that the rioters would care). But if Blake did not have access to a weapon...that cop is in a ton of trouble.
The picture you posted is interesting, but its kinda grainy. That could be a knife. It could also be a set of car keys. I hope the image can be enhanced.
He appeared to be reaching for something on the floor or under the seat so I guess it will all come out.
Not that it will matter to the "peaceful protestors".