Given your expertise as someone who's prosecuted, I want to talk about the nature of the evidence that's used. You mentioned police using standardized field sobriety tests. Canada has employed a number of people who are experts, called drug recognition experts, and their testimony has been accepted as expert opinion evidence by our highest court.
I'm wondering how it works in either state that you're familiar with. Are police simply applying the standardized field sobriety tests and bringing people in on the basis of that? Does it have to go to someone like a drug recognition expert? How does it work?