Driving Under the Influence Field Sobriety Tests FST

The local police as well as other law enforcement agency's in the state utilizes a collection of apparatus and tests to ascertain exactly how intoxicated a motorist might be. A standard technique of testing that's been utilized since the creation of driving under the influence laws are generally whats called Field Sobriety Test or "FST's". Some of the most common FSTs are "Horizontal Gaze" (HGN) "Nystagmus", the finger-to-nose, walk-and-turn, one-leg-stand, backwards counting and reciting the alphabet. Each individual test features its own pros and cons. Nevertheless, all of them share the exact same downside of depending upon actual physical ability that some people do not have.


Just as it states, the individual suspected of driving under the influence will be instructed to stand on one leg. If there's any kind of swaying or imbalance the individual may very well be charged with a DUI in the state of Tennessee. This test csn be erroneous in the event that the motorist should have a physical disability such as overweight, being affected by prescribed medication or the individule could be wearing high heel shoes.

HGN (Horizontal Gaze Nystagmus)

The Horizontal Gaze Nystagmus test is probably one of the most frequently recognized and scientifically approved.The law enforcement officer should have the suspect follow an item such as a pencil or pen as the police officer checks for indications of intoxication, insufficient effortless pursuit, deviation. Prescribed medication as well as other health issues may also effect eye nystagmus.


The suspected individule will be instructed to take Ten steps heel to toe, after that turn and do the ten steps backheel to toe. The police officer is going to be checking to see if the motorist is following instructions correctly capable of performing the physical activities with no stumbling or swaying. Once again, the test is creating the belief that the individule doesn't have any physcial disability which could impact the results of this test.

Finger-to-nose, reciting the alphabet and backwards counting

To execute the finger-to-nose test the suspect will be insyructed by the police offer to extend each arm the proceed to touch the end of their own nose area using their pointer finger. Missing the end of the nose area could lead to additional testing or being arrested and charged with a DUI. Being instructed by the police office to recite the alphabet or backwards counting might be difficult because of the strain of the circumstance, possibly nullifying virtually any kind negative results.

Just how can the results of the FST's be dismissed?

Apart from the actual physical presumptions in FSTs, it is crucial that the person suspected of DUI is aware of what the police officer is requesting. If required, the police officer will need to show how the task he or she is requiring you to complete. This is very important should there be any kind of language obstacles.