What Do Police Officers Seek During Field Sobriety Tests?
By Sullivan Rice
A particular phase in the DWI detection process involves pre-arrest screening, where a police officer, suspecting intoxication, may conduct field sobriety tests (FSTs) to establish probable cause for an arrest. These tests, typically standardized, aim to gather evidence supporting the suspicion of drunk driving.
If you're facing DWI charges in Minneapolis, reach out to Jack Rice Defense at (651) 447-7650 or (612) 227-1339 for assistance.
Understanding Standardized Field Sobriety Tests (SFSTs)
SFSTs, recognized by the National Highway Traffic Safety Administration (NHTSA), usually consist of three main assessments: horizontal gaze nystagmus, walk and turn, and one-leg stand. Each test evaluates specific indicators of impairment to determine intoxication.
Horizontal Gaze Nystagmus (HGN) Test:
This test assesses involuntary eye movements in response to a stimulus, such as a pen or flashlight, to detect intoxication. Officers observe jerking movements in the eyes when tracking the stimulus, indicating impairment. In order for this test to be administered accurately, there are very specific time and speed requirements. Even a slight deviation from these requirements and the test should be considered unreliable.
Walk and Turn (WAT) Test:
The WAT test requires individuals to perform tasks simultaneously, assessing balance, coordination, and divided attention. Failure to follow instructions, maintain balance, or execute proper turns may indicate impairment. Like the HGN, there are multiple additional considerations that cannot be ignored.
One-Leg Stand (OLS) Test:
Similar to the WAT test, the OLS test evaluates balance and divided attention. Individuals must stand on one leg while counting aloud, with indicators like swaying, using arms for balance, or inability to maintain the position suggesting impairment. Limitations in the application of this almost must be considered.
Reliability of SFSTs:
SFSTs are deemed reliable tools for detecting intoxication, depending upon whom you ask, with various accuracy ratings. However, various factors, such as health conditions, nerves, or environmental distractions, can influence test performance, affecting results.
Your Rights Regarding FSTs:
Legally, you have the right to refuse participation in FSTs without facing penalties. However, refusal does not guarantee avoidance of arrest, as officers may rely on other evidence to establish probable cause.
Defense Against DWI Charges:
Whether or not you participated in FSTs, our Minneapolis attorneys can assess your case and explore defense strategies. We have extensive experience challenging DWI allegations and protecting your rights throughout legal proceedings.
Schedule a free consultation with Jack Rice Defense by calling (651) 447-7650
or (612) 227-13399 or contacting us online.
