What worries me here is not that the policemen were irritated by a possible timewaster, nor even that they expressed their frustration in words in what they thought was a private conversation.
The worrying thing is that their natural reaction to being annoyed by a woman was to speak of her as a slag. Speaks volumes about their attitude towards women.
Decent men do not express their honest opinion of annoying women in those terms. That is the language of men who despise women and hate the idea of their sexuality.
And they are the ones in charge of responding to vulnerable women. It's not about this particular girl and how undeserving she may or may not be.
It is about the fact that the people who would get called out to any vulnerable woman who has been raped or abused work in a climate where they feel safe using that language to one another without fear of repercussions.
I simply can't imagine a colleague of mine, regardless of provocation, even if he was an utter bastard and privately thought of women in those terms, ever daring to use such language in the hearing of any other colleague : he'd just know nobody would accept it, he would be socially ostracised and probably reported. Quite regardless of what the woman had done to annoy him.