Yes, but outlining one way in which DA's might feel pressured to do what the police prefer even if it's not strictly supported by the law does not "imply that t

Yes, but outlining one way in which DA's might feel pressured to do what the police prefer even if it's not strictly supported by the law does not "imply that the only time DAs participate in gratuitous punishment of citizens is when cops threaten their careers". It only implies that's one way or reason why they might do that. That may seem pedantic, but I think it's very important when it comes to having useful and rational discussions. If anyone isn't seeing that, replace "DA" with a minority if your choice and "gratuitous punishment of citizens" with any other negative behavior, like theft or crime, and try to explain what the difference is between the statements. If we can't follow the same rational when assessing behavior of groups we have favorable or unfavorable predisposed opinions towards, then we can't even discuss effectively.