I personally would lay low for the time being. If you press this man, he could escalate it further with your landlord. You don't want that. It's unlikely that your dog will bite anybody, so according to NC law, your're unlikely to be haunted by the dog's "record.". I would, however, make sure that this won't interfere with moving the dog to Belize.
If he does sue, then you can deal with that if and when it happens. There's not a whole lot you can do to prevent that, although you might see what, if anything, your renter's insurance covers. The animal control person will be your best evidence as to the nature of the man's injuries, so make sure to keep a copy of his report. Just steer clear of hthe elderly man on any future walks. If the landlord gets on you, agree to muzzle the dog while in common areas. Try not to take it personally; they have liability issues to worry about.
That's just my two cents. Others may disagree.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher