The only way I can imagine she would get in trouble would be if she perjured herself or testified to some fact that would incriminate herself.
The bigger concern I see from your question is that you are attempting to defend yourself on a DUI charge. I strongly suggest that you contact me or some other capable criminal defense attorney to represent you in this matter.
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Your witness could possibly be charged with aiding and abetting a DUI. I've seen vindictive prosecutors do that.
I'm not sure I see the wisdom in having a witness testify you drank alcohol in a DUI case. You have to be careful. Some jurors hold the belief that its illegal to drink anything and drive although that is not the law yet they may hold you to it.
If your defense is that the BAC result is inaccurate you need expert witnesses to attack the accuracy of the test. If you do not have an experienced DUI attorney, get one.
This answer is my personal opinion, offered for informational purposes only. It is not a legal opinion, nor is it legal advice, nor does it create an attorney-client relationship with anyone reading it.
Brook M. Thibault
Law Offices of John D. hooker, Jr. & Associates
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Virginia Beach, VA 23451
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