§ 3.4 HORIZONTAL GAZE NYSTAGMUS (HGN)
| Jurisdiction | Arizona |
§ 3.4 HORIZONTAL GAZE NYSTAGMUS (HGN)
State v. Superior Court (Blake),149 Ariz. 269, 718 P.2d 171 (1986)
The HGN test is sufficiently reliable to establish probable cause for arrest and satisfies the Frye test for admissibility. However, the results of the HGN test are not admissible as direct independent evidence to quantify a defendant's blood alcohol content.
State ex rel. McDougall v. Ricke,161 Ariz. 462, 778 P.2d 1358 (App. Div. 1, 1989)
HGN results are not independently admissible to show a specific blood alcohol content, but an officer may testify, after laying of a proper foundation, that the HGN results indicate a blood alcohol content greater than 0.10. The required foundation for...
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