My wife was driving home had a few drinks

Retain experienced DUI attorney immediately. There are far too many more facts that could help her in her defense than you ought to be posting on a site like this. Wife should say nothing at all to investigators that could later be used as an admission. My gut feeling, and that is all it is, is that she has a defensible case. [Cars have gone off the road in storms without driver impairment and how does "concerned" know that anyone was intoxicated.] Retain experienced counsel to help. This answer is provided for informational purposes only. Actual legal advice can only be provided in an office consultation by an attorney licensed in your jurisdiction, with experience in the area of law in which your concern lies.

There are a number of ways to defend this charge. Hopefully, your wife invoked her legal rights and did not make any statements to law enforcement. Even if she did, there may be ways of challenging those statements. Questions that should be explored include... Did the concern citizen identify themself? Did they identify your wife? Can anyone actually place your wife behind the wheel? If so, can they establish that her driving abilities were impaired DURING the time when she was driving? You should consult with a Las Vegas DUI defense attorney immediately to ensure that your wife's rights are protected. See the link below for some available through this website. Best of luck to you and your wife. John Buckley