1. 10.4 Notes Field Sobriety Tests

2. Objectives  Describe commonly employed field sobriety tests to assess alcohol impairment

3. Field Sobriety Testing  Used to determine the suspect’s physical impairment  Determines whether the evidential test is justified  Portable, handheld device is used but is considered nonevidential and serves to establish probable cause

4. Field Sobriety Tests Horizontal gaze nystagmus (HGN)  Involuntary jerking of the eye as it moves to the side following a pen light http://www.shorewood-hills.org/departments/pd/courtsfst.jpg

5. Field Sobriety Tests Walk and turn  Stand heel to toe and listen to and comprehend test instructions  Walk in a straight line touching heel to toe for nine steps, turn around, repeat

6. Field Sobriety Tests One leg stand  Maintain balance standing with heels together listening to the instructions  Stand on one foot holding the other several inches off the ground for 30 seconds and count out loud

7. 10.3 & 10.4 Questions 1. Explain how a fuel cell detector measure blood alcohol concentration. 2. Name the key to the accuracy of a breath test. 3. Define slope detector and explain how it works. 4. Identify the types of tests included in a field sobriety test. 5. Identify and describe two divided-attention tasks administered during a field sobriety test.