A conference for police officers was recently held in Virginia Beach at the Virginia Beach Convention Center. The focus of the event was on new techniques for police to use in DUI enforcement.
One demonstrated technique mentioned in the article was from an optometry professor. He instructed officers in the Horizontal Gaze Nystagmus test, or HGN. The Horizontal Gaze Nystagmus is a test that measures involuntary movement of the eye, and is said to be correlated with alcohol impairment.
However, many experts feel that this is a scientific test that is very difficult for an untrained police officer to give an honest assessment. What is the basis for comparison? How can the officer measure the angle of the deviation to determine if it is within normal parameters? Ultimately, the officer’s analysis is pure guesswork.
For this reason, most Virginia DUI Lawyers can get HGN evidence dismissed by judges.