Better yet, she has a claim under the Federal Civil Rights Act, 42 USCS §1983, for deprivation of her constitutional rights without due process of law. (The "due process" in this case would have been a simple field Breathalyzer that would have demonstrated that she was 100% sober.)
The very simple solution is for all police departments to equip their patrol vehicles with audio and video recording devices. The police department in my city did that about three years ago and the result has been a significant reduction in the number of DUI arrests and a significant increase in the number of convictions of those who are arrested. Let's face it: Cops lie like Bill Clinton, except when they know they are being recorded, in which case they tend to follow the rules and only arrest people those people who, from any reasonable objective standard, are driving under the influence. As a result prosecutions are down, but convictions are up because the audio/video tapes are much more believable than a lying cop with an attitude.
I think we all should have audio and video equipment in our own cars just to protect ourselves from the cops.