Shelf Number: 0700 - 03
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