If the system itself is set up such that it covers up the crimes of cops, which I would argue it is, then yes - simply by knowing that information and choosing to participate in the system, you have just helped cover up crimes, which is a crime.
Consider: is it possible to be an ethical member of the mafia?
> Somewhere your thought process is broken. You do not appear to have a strong concept of causal relationships.
I don't think you even believe this is true, you're just short circuiting like a poorly built robot. You can't respond to what I'm actually saying so it's just "uhhh uhhh you're not logical! I can't respond to illogical people!"
But think about it, for like longer than 5 seconds. If you know the police do bad things, and you want to join anyway, doesn't that mean that you must want to do bad things? And, if you're in the forced, doesn't that mean that you're helping and abetting said bad things?
If your brain really can't comprehend why that doesn't compute, then okay remove the world police. Replace it with mafia, or pirates, or gang, or Nazis. The concept itself makes sense, no?
I think the problem is that you intrinsicly view the police as good guys, they fight crime. But that's not really true, one because good guys and bad guys don't exist, that's comic book stuff, but also because the police are systemicly, institutionally, evil. Like, from their conception as slave catchers in the south.
You might view the police as good guys who sometimes do bad things. Others view them as essentially a gang. Except a state-sponsored gang, which is much much worse.
In that light, do you understand how ACAB might come to be? Even if you don't agree with it?