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Today's Terms
Reasonable suspicion
Definition:
The officer must have what is legally termed a "reasonable suspicion," based on something unusual that is actually observed about the way a person is driving. This is a very low standard and it can be satisfied by virtually anything which appears out of the ordinary and that might be a sign of a driver being under the influence. In addition, during holiday seasons, police officers typically set up field sobriety checkpoints where they routinely stop every driver who passes through the checkpoint.
Horizontal Gaze Nystagmus (HGN)
Definition:
Horizontal gaze nystagmus is a naturally occurring involuntary jerking of the eyeballs as they gaze side to side. It is theorized that when a person is impaired by alcohol, the nystagmus (the jerking of the eyeballs) is magnified or pronounced.
Impairment
Definition:
Well known is the fact that the consumption of alcohol can cause impairment. Perhaps less recognized is that fact that impairment rises gradually at lower levels but dramatically at higher levels of blood alcohol concentration (BAC).
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