Each one of the tests in the standardized field sobriety test—the three-test battery—has specific validated clues. So it's not a matter of my saying, I want you to do this test and I'm going to use my criteria. The criteria are set out. For example, a walk and turn test has eight validated clues. If you show two or more, then the validation studies have shown that the probability of your blood alcohol concentration being over 80 milligrams is 72%. Then there's the other 28%; but based on the fact that we're talking about suspicion to reasonable grounds, we would go to the breath demand.
On June 14th, 2007. See this statement in context.