Rookie Officer-Ethical Decision

You are a rookie police officer and are riding with a Field Training Officer (FTO). During your shift the FTO stops at a convenience store and quickly drinks four beers in the back room of the store. He is visibly affected by the beers and the smell of alcohol is very noticeable. What should you do? What if the FTO had just written up a favorable evaluation of you even though you should have received a reprimand for an improper disposition of a traffic accident?

Share the moral rule(s) and ethical system that corresponds with your decision.