“If Arizona voters legalize marijuana, questions are being raised about how to test if someone is driving stoned.”

“One of the most hotly debated questions in Prop 205: How do you prove a marijuana DUI?”

“A bay area company is making strides in measuring how much pot people smoke or consume.”

“In breath, THC only stays for a very brief period of time. So unlike, saliva, blood or urine, where what you did last weekend, will still show up in that [bodily fluids]. In breath, it just doesn’t. It only shows up for a few hours.”