It's important, from our perspective, that the police officer on the road is looking for impaired drivers. It begins with a suspicion. Whether it's driving down the road in an improper fashion, whether it's that when you stop the vehicle you smell alcohol or marijuana, or that you look at the individual and begin to see symptoms and signs of other drug use, it leads to a suspicion, which leads to tests for impairment.
On June 12th, 2007. See this statement in context.