On the point of view part, I remember a shooting, I use it as an example in my CCW classes.
But an Officer shoots a bad guy, his partner is threatened with perjury charges when he didn’t corroborate the prosecutions assertion that the first Officer had shot the “victim” when the “victim” wasn’t a threat. The prosecutor kept badgering the second Officer, until another witness pointed out that the second Officer couldn’t even see the “victim” from where he was.
Then there’s the “lying”. Having played back more than a few recordings of my own early situations, I would have sworn on a stack of bibles that I had said “X”. When in all reality, what I actually got out was unintelligible, sounding more like Gabby Johnson and his authentic frontier gibberish from Blazing Saddles.
Watching videos from other incidents, and having heard some of my coworkers, you hear the high pitched voices, almost pre-teen female from some of the biggest and baddest dudes when it hits the fan.
Are all cops good, honest and trustworthy? Sad to say but no. But the majority are. And “we” do try to weed the bad ones out.