Can HGN test results be used as evidence in court?

The HGN test results can indeed be part of the evidence in DUI cases because they provide observable indications of potential impairment. The Horizontal Gaze Nystagmus test measures the involuntary jerking of the eyes as they move from side to side, which can be amplified by the consumption of alcohol or certain drugs. This test is recognized and accepted by law enforcement as a reliable method to assess driver impairment.

In court, HGN results are utilized as they can support other evidence presented, like field sobriety tests or breathalyzer results, to establish that a driver was under the influence at the time of the stop. Courts often consider HGN results credible if they are administered correctly according to standardized procedures and if the officer providing testimony is properly trained. This integration of HGN testing into evidence is crucial for building a convincing case in DUI prosecutions.