Then you might suppose those good cops might stand up when one of their buddy bad cops kills unarmed people or does something equally wrong. And you might suppose that, while silence doesn't imply consent, that maybe it implies something a bit more serious in a profession where people can kill with impunity and get put on paid leave while the situation is sorted out. You might suppose that maybe those good cops should publicly speak out when their departments do something bad. If they don't, you might suppose that their primary interest is in saving their jobs, our lives be damned.