When deputies approached Wilson, they said he continued to walk away despite orders to stop.
Now that's an easy way to get shot.
I'm no great fan of the cops (I think they are going all out military, and I don't like it!), but if you are ordered to stop...
you stop! You can argue the merits of the case with a judge. An arresting officer is the last guy you want to argue with.
I wonder if the Occupiers ever saw that Chris Rock video: How not to get your ass beat by the police.