Canada

The reason all cops are bastards is that it’s incentivized by the police force itself. Cops who speak up about the misbehaviour of other actual bastard cops, are mistreated and even pushed out. This leads to a situation where they will look the other way when shitty cops do shitty cop things, in order to keep their job or feel safe or just not have a terrible time at work. But by looking the other way, they have been corrupted and are a huge part of the problem.

I’m sure logically there are some niche situations where a cop has never faced that choice and hasn’t done anything morally reprehensible themselves, but ACAB is more about the corruption necessitated by the system than the actual day to day conduct of cops who aren’t directly evil. Of course it’s good that someone stops people on murderous rampages, but the system supporting those people is broken in a very dangerous way that lets them also get away with terrible crimes.

If you have a good relationship with your sister-in-law you could ask if she’s ever seen or heard of or suspected any bad behaviour by her fellow officers, and what she did about it?