I have a friend who is a car hauler; he drives for a decent company, and he's good at what he does, but they are an outlaw operation. He also gets advanced notice of upcomming "random" tests!!
You just proved my point whether you know it or not
Anyway if the guy takes the test and if he's using drugs he'll fail because a few days of not using drugs won't matter a bit.
Wish you'd tell the rest of us who this guy is driving for so we can get the hell out of his way.