That happened once, so it's not actually true as a general rule. That guy getting killed for resisting arrest for selling cigarettes, that whole situation is more indicative of the overall role of the police to enforce laws using their monopoly on legitimate violence. The law professor's quote I have in this article was in response to that killing: https://medium.com/non-violence/police-nullification-minority-protection-from-tyranny-of-the-majority-a6174224beea