It is hard to see shooting Brown to death as justified. Maybe (just maybe) disabling him was necessary. It does look a bit over the top to shoot him for jaywalking. That was the first issue - should he have been in the middle of the road?

I am unclear whether the officers involved in the shooting actually knew of the events at the convenience shop.   

The videos at the convenience shop are argued to how that Brown paid for all his cigars. That grossly overeggs the pudding. He approached the counter and left a packet of something (probably cigars) there. It looks as if he collected money contributions from his companions. A hand from behind the counter is seen to take some money. We know not for what. Then Brown picks things off the floor. Why would cigars he had paid for be on the floor? Switching to the second video, he is near the door. Someone approaches him - it is not clear who - and Brown thuggishly pushes them aside. At that time it is possible to see a number of things in his hand. They might have been cigars he had paid for, they might have been cigars he had not paid for. But his brutish behaviour is clearly to be seen.

I therefore have less sympathy for him.

On the other hand, I am clear that the USA is a racist place, that he would probably not have been hassled for jaywalking if he were white, and that he would probably not have been shot had he been white. If the police had had no guns, he would definitely not have been shot.