@bythewell - Police work always used to be traditionally male centered and I think there are just some people who think it should stay that way. The problem is that this kind of job ends up with a culture based around being a man, and being strong and silent and not being disloyal to your fellow officers.
So when women join up and are mistreated because of their gender, they can either complain, and "prove" that they don't fit the traditional mold and shouldn't be allowed into the boys' club, or they can stay silent and nothing ever changes.
It's the same problem with the military right now. And the thing is, that kind of environment is toxic for both men and women and even if there wasn't rampant sexism it would be better for everyone if it was changed. Abuse shouldn't be covered up and ignoring it isn't being loyal.