I do not even believe that "good apples" makes any sense. Let me tell you an old story from a few decades ago.
The county-mounties tripped over us. Which is to say, they just happened to notice that we had something odd, and one of us told them it was cannabis (or some slang term for it). So there was a bit of a to-do over that, and once things had settled a bit, one of them walked up to me and stuck his hand in my trouser pocket. I said, “Hey, you can't do that,” and next thing I am up against the wall as a hostile person.
Now, I believe that his only goal in sticking his hand in my pocket was escalation. We were not out in the middle of nowhere, nor were we down in the heart of town. It was kind of out of the way but not remote. When you are faced by two or three officers, you have absolutely no power of your own and they hold all the cards. All they have to do is blow a situation up a little and you are toast.
In the end, they confiscated our cannabis, told us they would be reviewing the situation and let us go. Never heard another word about it. My understanding is that in that part of the country (a county in Alabama that is many hundreds of miles from where the state of Alabama is) the LEOs would bust people for cannabis, confiscate it, give them a warning and those people would be buying the same stuff back from a dealer who got his stock from the local LEA. I firmly believe that that was what was going down there.
My point, to reiterate, is that LEOs have total authority in encounters with citizens and the training needed to blow a situation up if that is what they feel like doing. You are expected to answer their questions and follow their instructions, and they get to decide when the encounter has become problematic. Not to mention that police reports and testimony are treated as more accurate than that of citizens. If you claim they lied, you better have solid proof (and hope they have not deleted it from your phone or "accidentally" bricked it).
Philosophically, I do not believe in objective "evil", because almost everything can be viewed from multiple perspectives. If you were a German living in the Third Reich, you might well have seen the cause as noble. The deciding factor, though, is power over others. You just cannot have anything that could be called "evil" in absence of power, and power is nearly impossible to control. As I see it, the police are granted too much power, and the evidence strongly suggests that they never, ever, learned to got it under control.