Then he goes through a process of evaluating how this individual reacts under different forms of light. Every police officer on the street will have to be trained quite thoroughly. I can see this as a real defence lawyer's boon, in a way, questioning, how long did you test him or how bright was the light? I can see a myriad of things coming into play here. What is going to be standard practice and acceptable?
On May 30th, 2007. See this statement in context.