At work I heard a rumor of a new candidate applying for a few positions at the company. I learned that this new person is someone I attended University; with lets call him Tom. While we did not become friends we did have several classes together and completed several group projects as a team. Tom is smart and worked hard but his personal life seemed to completely revolve around smoking pot (which is legal in the state I live in). Now the company does do a drug test upon hiring and doesn't allow employees to smoke weed for any reason.
My first question is should I put a good word in for him with my boss? My second question is should I tell them about Tom's questionable conduct during our time in college together?