06-19-2018, 05:29 PM
(06-19-2018, 05:03 PM)Sled21 Wrote: Which is why you do not give just one. The divided attention tests have between an 80 and 90% accuracy, when done with a Horizontal Gaze Nystagmus test.... not to mention the roadside Preliminary Breath Test. I can tell you in 20 years, I never had someone fail the tests and then pass the breathalyzer at the jail. Sometimes their BAC was higher than I thought it would be, but never lower.
HGN is not even admissible in court.
Road side preliminary breath tests are fairly accurate.
Field sobriety tests are somewhat accurate. It is not as simple as an officer just saying "he looked drunk". They have to be properly explained and each specific failure has to be noted (it takes more than one to find intoxication). But I have seen people fail field sobriety tests that were not under the influence.
