Let the ex make it go away. You won't lose a work day and pay. If you wanted to go to court, the purpose should be to make the officer look like the dork he is, using a cross examination and line of questioning, but do you really want to do that and possibly cross his path again in the future?

With the ex's way, the officer might just be left wondering... wha happn'd??? and if you cross paths again, you can remind him of this.