I do know there have been quite a few stories in recent years regarding deadly shootings by police of citizens, who had until that time had no interaction with the justice system, that people should find troubling.
Its not my problem if it doesn't concern you.
Okay, so LEOs should stand passively by while a psychotic individual violently attacks them and others, until they can determine if that aggressor has had an interaction with the justice system?
Can I make a suggestion? Why don't you do a "ride along" with a local law enforcement agency? You'll see things from a completely different angle than someone who's received some speeding/parking tickets they feel they didn't deserve.