Zircon, you're getting so much stronger, while he's getting worse. Like you, I hope he doesn't hurt someone.
If there's an accident caused by DUI, the perp always seems so remorseful but that doesn't bring back the life they've taken or ruined. As Lexie says, if you can pin him down driving at a particular time, call the police. Hopefully that will take him off the roads.
Enjoy your trip to Florida.