Search the phrase “per se DWI North Carolina,” and the results look deceptively confident. AI summaries and legal directories will tell you that if your blood test hits a
certain number, a conviction is inevitable.
It is not the language of the statute. It is not the language used to instruct juries. It is a mantra of sorts that has been repeated so often it now masquerades as doctrine.
North Carolina’s DWI statute does not use the phrase per se impairment for alcohol or marijuana, and North Carolina’s jury instructions do not tell juries that a specific number automatically requires a finding of guilt. That phrase does not appear anywhere in N.C.G.S. 20-138.1.
Carolina Criminal Defense & DUI Lawyer Updates
technical procedures—such as chemical breath tests, blood alcohol analyses, and field sobriety testing—that lay jurors or even judges may not fully understand. An expert witness, properly qualified and admitted, can provide insight into such complex matters both for the prosecution and the defense.