Watch defense expert Zettl testify about the usefullness of Field Sobriety Tests. He testifies that 2 clues in a 1 leg stand alone equates to a 65% liklihood of a .10 BAC and with 2 clues in the 1 leg and walk and turn a 68% liklihood. He misses the 3 test percentage number.
Admits if the tests are done properly the tests not quite infallible.
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