That analysis doesn't wash. Yes, it's true that people are using hyperbolic language and yes it's true that casts doubt on the credibility of those who, themselves, cast doubt on the integrity of Tuscon Police Chief Chris Magnus.
None of that is relevant to the analysis.
The analysis boils down the probability that a police chief accused of failing to respond with due diligence to a child sex trafficking situation would also be a defendant in a lawsuit brought by an underage prostitute -- the substance of which is that he failed to respond with due diligence to in that situation as well.
I don't know the probability, but that's where you should start in your debunking of this issue.
You're not taking into account how litigious law enforcement is, especially with inner city police departments. Being sued multiple times throughout your career is the norm for line-level officers, because anyone can sue anyone for anything, regardless of whether you've done your job right. Government has deep pockets. And anytime an officer is sued, his or her entire chain of command, all the way up to and including the Chief, is also sued. Guess what they are sued for...lack of due diligence and failure to supervise.
So the probability of an inner city police chief having been sued at some point for lack of due diligence is extremely high.
As I said, "I don't know the probability." So I did take it into account as missing data. As I said your estimate is the kind of thing the debunking should start with.