Washington State DUI Lawyer: The DUI Investigation Handbook

Washington State DUI Lawyer:  The DUI Investigation Handbook

The following is an excerpt from the recently published The DUI Investigation Handbook.  This most valuable DUI Investigation book details in its 145 pages the entire DUI Investigation process law enforcement officers use to detect and investigate DUI drivers.  The DUI Investigation Handbook is available at over 100 locations including Barnes and Noble and Amazon.com.  David N. Jolly is the author of 5 DUI books and the first DUI App for iTunes in the United States.  His next book, The Drug DUI Handbook, is due for release in September, 2011, and is the first book of its kind in the United States.  Look for excerpts in late August, 2011.

How to Perform the Horizontal Gaze Nystagmus Test

Administrative Procedures of the HGN

1. Check for eyeglasses;

2. Verbal instructions;

3. Position stimulus (12-15 INCHES);

4. Equal pupil size and resting nystagmus;

5. Tracking;

6. Lack of smooth pursuit;

7. Distinct and sustained nystagmus at maximum deviation;

8. Onset of nystagmus prior to 45 degrees;

9. Total the clues

10. Check for vertical gaze nystagmus.

Jolly, David N.  The DUI Investigation Handbook.  Outskirts Press, Inc.  Page 47 (2011)

For information on your Washington State DUI or your Snohomish County DUI, King County DUI, Skagit County DUI, Island County DUI or Whatcom County DUI  please contact our Washington State DUI attorneys for a free consultation at 425-493-1115, email us at david@davidjollylaw.com, or check out our main website at http://www.washdui.com or www.mukilteodui.com, www.everett-dui.co, www.marysville-dui.com, www.dui-bothell.com, or www.anacortesdui.com.  We represent DUI clients in every court in Western Washington including Seattle DUI cases, Kirkland DUI cases, Redmond DUI cases, Shoreline DUI cases, Lynnwood DUI cases, Everett DUI cases, Mukilteo DUI cases, Marysville DUI cases, Mt. Vernon DUI cases, Anacortes DUI cases, and Bellingham DUI cases.