I agree with Mr2001. I think it is the drug laws of this country that are immoral, and under no circumstances would I turn someone in for using or selling drugs to consenting adults. (I suppose I would think harder about someone selling to children.) With mandatory minimum sentences you could be condeming him to more than 12 years in prison.
I would do whatever you (ethically) can to get him removed from the job, as others have recommended.
If he goes to jail (and let’s get real: a quick investigation of the stats for TN shows that he won’t serve anywhere near 12 years, unless he’s a repeat offender), it won’t be for being a jackass. It’ll be for doing something a jury of his peers gave him 12 years for, after hearing far more evidence than you have. (Or else, for a case whose facts so offend the judge that s/he imposes the max, and which his lawyer didn’t want to risk placing before a jury.)
A lot of people cruise along, doing nasty things, no one really the wiser, when in hindsight they should have been stopped long before . Many misdemeanor possessions mature into third strike felonies, but at least as many end up making someone straighten out. We all make mistakes, but a lot of people refuse to learn from them. As others have said, if you think you have the RIGHT to decide by yourself on limited data, fine - but YOU are taking the responsibility then.
I’ve seen too many lives -offender and victim- wrecked by the schoolboy code . If you don’t believe in a law, no problem; if you do, fine. Either way: behave accordingly.
Forget that he is a jackass. That should play no role in your decision. If you are a laissez-faire type, ask yourself if it is a serious philosophical commitment or a cop-out. Would you feel hesitant if he was a jackass and child molester? A priest who’d revitalized the parish and a murderer? Should a “leading citizen” in your town be immune from littering or speeding tickets. What’s the moral dilemma here? Getting involved?
It isn’t easy. I understand that. I, personally, am grateful that I’m ethically precluded from reporting most of the users I meet. Then again, I’m professionally obligated to help them, whether I feel like it or not. I made my choice. It suits me. I hope you make a choice that you’re as happy with. Just don’t choose "doing nothing because it’s easier. That’s the most tempting and amoral choice.