Certainly not as primary evidence in court. I don't think you can correlate passive detection with blood alcohol in a person's body. It certainly gives you further evidence that there is alcohol in the vicinity, and the likelihood is that it is coming from his body. However, as I commented to the other member, the other possibilities of where that is coming from would be raised. That's something that training can assist with, but it is something we should be aware of.
On October 20th, 2016. See this statement in context.