December 15, 2017

Shelf Number: 0700 - 03

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Horizontal Gaze Nystagmus - The Science & The Law: A Resource Guide for Judges, Prosecutors, and Law Enforcement

This guide provides an overview of the science supporting the HGN test as a valid indicator of impairment, distinguishes between HGN and other forms of nystagmus, and provides the necessary tools to establish admissibility of the HGN test in court.

Available Media: Print

Faculty Author: James J. Dietrich, Staff Attorney American Prosecutors Research Institute's National Traffic Law Center

Producer: Dept. of Transportation's National Highway Traffic Safety Administration

Source: USDOT

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