"Be careful in AZ if you have CO plates. My buddy pulled to the shoulder to change a flat and a cop pulled up to "help". When the officer stated that he smelled marijuana and proceeded to search all of his vehicle and belongings. Two hours later, the officer gave up and left without even waiting for my friend to repack his truck."
I've heard of that happening to other people but we've driven from CO to TX to FL without as much as a glance in our direction. I'm not concerned about having my truck searched but it sure would be annoying to have to repack everything. These stories pop up a lot on forums but yours seems to be the first that's verified.
Out of curiosity, what's his age and truck?