A jury convicted Manley of driving under the influence of alcohol to the extent that it was less safe for him to drive, OCGA § 40-6-391 (a) (1), and having a blood alcohol concentration of .12 grams of alcohol or more within three hours after being in actual physical control of a moving vehicle, former OCGA § 40-6-391 (a) (4). Both charges stemmed from the same incident. The court merged the second count into the first and sentenced only on count one (“less safe”). Manley’s motion for new trial was denied.
The sole challenge is that the trial court erred in allowing evidence of the Horizontal Gaze Nystagmus Test (HGN) to be presented to the jury “when the test did not reach a level of verifiable certainty and acceptance by the scientific community for the purposes used in this case.” The HGN is a test manifesting an involuntary rapid and then slow jerk of the eye. It is one of the field sobriety tests used as an indicator of alcohol or other drug use. See
Mendoza v. State,
“In determining whether a given scientific principle or technique is a phenomenon that may be verified with such certainty that it is competent evidence in a court of law, trial courts have frequently looked to see whether the technique has gained general acceptance in the scientific community which recognizes it. Frye v. United States, 293 F 1013 (D. C. Cir. 1923);
Salisbury v. State,
In this case, the trial court denied Manley’s motion in limine after concluding that the HGN test had been used like any of the other accepted field sobriety tests and was valid for the purpose of indicating the presence of alcohol, especially in light of the fact that the officer did not rely solely on the HGN test but used it instead in conjunction with other tests and observations.
The court’s decision to allow the HGN evidence as a valid field sobriety test followed, inter alia, detailed expert testimony at the motion in limine hearing to the effect that the HGN test had reached a stage of verifiable certainty in the medical community as being an indicator of something wrong with the central nervous system or the vestibular apparatus or the eye; that one of the factors that might create horizontal gaze nystagmus was the presence of alcohol or drugs; and that although the test originated in the medical community, it was a scientifically reliable field sobriety evaluation — a tool and reliable indicator along with others of the influence of alcohol.
Based on the evidence, the court did not err in ruling the HGN test admissible as valid to show a symptom indicative of, though not determinative of, the presence of alcohol.
Had it been error to admit the HGN evidence, it would have been harmless in light of the other overwhelming evidence of Manley’s guilt.
Foster v. State,
Judgment affirmed.
