Was it the OKC PD, or the prosecutor? It's the prosecutor's office who decides the charges. Not that the OKC PD are blameless, but when it comes to bogus charges, I would look at criticizing the prosecutors, not the cops, because they have ultimate discretion and responsibility here. Cops can arrest you for all kinds of shit, only the prosecutor can charge and go ahead to trial. Prosecutors are also more susceptible to political pressure.