reasonable doubt

November 16, 2025

Breath, Blood, Bull: Challenging NC DWI SFSTs

This post continues the Breath, Blood, and Bull series, an in-depth look at how science, procedure, and perception collide in the prosecution and defense of DWI cases in North Carolina. The first installment examined the limits of chemical testing. The second article turned to the machines that interpret alcohol breath samples into evidence, using the “breathalyzer.” This post focuses on the field sobriety tests or “SFSTs” that often precede BAC testing.

Standardized Field Sobriety Tests (SFSTs) are a battery of three roadside exercises: Horizontal Gaze Nystagmus (HGN), Walk-and-Turn (WAT), and One-Leg Stand (OLS), designed by NHTSA to gauge impairment.

When prosecutors rely on Standardized Field Sobriety Tests to support a DWI charge, the assumption is that these dexterity exercises offer reliable, objective proof of impairment. Yet the science tells a more complicated story.

March 11, 2025

Expert Witnesses in North Carolina DWI Cases: Types, Testimony, and Legal Considerations

by Carolina Attorneys

Prosecutors and defense attorneys regularly rely on expert witnesses to explain evidence that benefits from specialized knowledge. That may involve reviewing things like breath and blood testing procedures, DUI retrograde extrapolation, accident reconstruction, and medical conditions that could affect impairment assessments. This article examines the different types of experts used in North Carolina DWI cases, how courts determine whether their testimony is admissible under Rule 702, and what legal considerations apply when presenting expert evidence in court.

Understanding these issues can help if you’re facing a DWI charge. Expert testimony can play a significant role in North Carolina Driving While Impaired (DWI) cases, particularly when scientific, medical, or technical issues arise. Whether challenging the accuracy of a chemical test, questioning how an arrest was conducted, or providing insight into how a collision occurred, experts may help clarify complex evidence for a judge or jury.

What Is an Expert Witness?

February 20, 2015

Reasonable Doubt in Charlotte

by Carolina Attorneys

Reasonable Doubt A reasonable doubt is a doubt based on reason and common sense arising out of some or all of the evidence that has been presented, or lack or insufficiency of the evidence as the case may be. Proof beyond a reasonable doubt is proof that fully satisfies or entirely convinces you of the defendant’s guilt.

Legal Reference Materials: NC Judicial College Jury Instructions Notebook Materials

Modified Transcript of “Reasonable Doubt in Charlotte” for the Hearing Impaired: