Here is the law in TX
Tex. Penal Code § 42.01 (2007)
§ 42.01. Disorderly Conduct
(a) A person commits an offense if he intentionally or knowingly:
(1) uses abusive, indecent, profane, or vulgar language in a public place, and the language by its very utterance tends to incite an immediate breach of the peace;
(2) makes an offensive gesture or display in a public place, and the gesture or display tends to incite an immediate breach of the peace;
(3) creates, by chemical means, a noxious and unreasonable odor in a public place;
(4) abuses or threatens a person in a public place in an obviously offensive manner;
(5) makes unreasonable noise in a public place other than a sport shooting range, as defined by Section 250.001, Local Government Code, or in or near a private residence that he has no right to occupy;
(6) fights with another in a public place;
(7) discharges a firearm in a public place other than a public road or a sport shooting range, as defined by Section 250.001, Local Government Code;
(8) displays a firearm or other deadly weapon in a public place in a manner calculated to alarm;
(9) discharges a firearm on or across a public road;
(10) exposes his anus or genitals in a public place and is reckless about whether another may be present who will be offended or alarmed by his act; or
(11) for a lewd or unlawful purpose:
(A) enters on the property of another and looks into a dwelling on the property through any window or other opening in the dwelling;
(B) while on the premises of a hotel or comparable establishment, looks into a guest room not the person's own through a window or other opening in the room; or
(C) while on the premises of a public place, looks into an area such as a restroom or shower stall or changing or dressing room that is designed to provide privacy to a person using the area.
(b) It is a defense to prosecution under Subsection (a)(4) that the actor had significant provocation for his abusive or threatening conduct.
(c) For purposes of this section:
(1) an act is deemed to occur in a public place or near a private residence if it produces its offensive or proscribed consequences in the public place or near a private residence; and
(2) a noise is presumed to be unreasonable if the noise exceeds a decibel level of 85 after the person making the noise receives notice from a magistrate or peace officer that the noise is a public nuisance.
(d) An offense under this section is a Class C misdemeanor
unless committed under Subsection (a)(7) or (a)(8), in which event it is a Class B misdemeanor.
(e) It is a defense to prosecution for an offense under Subsection (a)(7) or (9) that the person who discharged the firearm had a reasonable fear of bodily injury to the person or to another by a dangerous wild animal as defined by Section 822.101, Health and Safety Code.
From your description her conduct was not a violation of this statute. I think the police need to get a thicker skin.
I recommend that you get an attorney, since I think, again based on your description, she can win this in court. In fact, I suspect that when the prosecutor reads the file, the may dismiss at the arraignment
Please let me know if you have further questions; if so I will do my best to answer them. If not please hit the accept button, its the only way I get paid.