The PBT ( portable breath test) result is not admissable in court because te devices are not calibrated weekly . The PBT is no different then a finger to nose test or NGH or nine steps heel to toe.....
If you would have blown a 0.08 % BAC or over the cop could have arrested you on an OVI , however, he had just told you that he didn't think you were over the legal limit . So if he would ahve arrested you on the PBT reading would have been saying that he was wrong.
I would have made you get a ride and parked you vehicle .
The Eye Thing .... or commonly called the HGN test .
We are looking for the lack of smooth pursuit of the eye ball , and onset of nystagmas(SP?) ( uncontrolled shaking of the eye ) at or before a 45* angle. It is very effective at determining the level of intoxication . Some Officers can call the BAC numbers in the field just from the HGN results.
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