The shooting in Missouri was justified. You can't rob a store, assault the clerk, walk down the middle of the street with no regard for traffic, verbally and physically assault a police officer who rolled down his window to tell you to get off the street, try to take his gun, resist arrest, and then charge the police officer (who still is in possession of only gun in the fight). 10 times out of 10, whether your white, black, yellow or green, that gets you shot.
The poor b@stard selling cigarettes was a victim of homicide. Plain and simple. That cop choked him out and killed him for no reason. Resisting arrest should get you cuffed, clubbed behind the legs, tasered at most, but not choked to death.
Cops are like everyone else. There are good cops, bad cops and criminal cops.