With the proviso that it’s not clear that it was really written by a cop, this Medium post, Confessions of a Former Bastard Cop, is worth a read. It sounds pretty believable to me:
To understand why all cops are bastards, you need to understand one of the things almost every training officer told me when it came to using force:
“I’d rather be judged by 12 than carried by 6.”
Meaning, “I’ll take my chances in court rather than risk getting hurt”. We’re able to think that way because police unions are extremely overpowered and because of the generous concept of Qualified Immunity, a legal theory which says a cop generally can’t be held personally liable for mistakes they make doing their job in an official capacity.
When you look at the actions of the officers who killed George Floyd, Breonna Taylor, David McAtee, Mike Brown, Tamir Rice, Philando Castile, Eric Garner, or Freddie Gray, remember that they, like me, were trained to recite “I’d rather be judged by 12” as a mantra. Even if Mistakes Were Made™, the city (meaning the taxpayers, meaning you) pays the settlement, not the officer.
Once police training has – through repetition, indoctrination, and violent spectacle – promised officers that everyone in the world is out to kill them, the next lesson is that your partners are the only people protecting you. Occasionally, this is even true: I’ve had encounters turn on me rapidly to the point I legitimately thought I was going to die, only to have other officers come and turn the tables.
The whole thing is worth reading. ACAB is another catchphrase that sounds overly radical but you might change your mind about that after you read this.