If there was no probable cause to pull my mother over, can her DUI be dismissed?

Question Details: My mother was pulled over for her license plate lights being out. However, when her and the officer walked back to look they were both on. She was then arrested for a DUI. Is there a chance that she can get the DUI dismissed because there was not a reason to pull her over in the first place? They haven't filed the charges yet because out DA is out of town for the week. She has a driving job and she needs to know if this is something she has a chance at fighting or if she needs to come up with a plan for her life. Everything is riding on this.

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