"Don't assault or murder" is the most important rule for those patrolling society with deadly weapons. It's something we assume, before we get to their actual functions like deterring crime or capturing fugitive criminals.
Insofar as armed patrols permit assault and murder, they cease to be "police" in any sense that society needs. If they permit themselves to assault and murder, they become an institution that the rest of society must eradicate and replace with something better.
Insofar as armed patrols permit assault and murder, they cease to be "police" in any sense that society needs. If they permit themselves to assault and murder, they become an institution that the rest of society must eradicate and replace with something better.