As a business owner, you are now on notice that this guy is willing to commit such acts in public. It might be your other employees or even your own customers who are the next target.
Remember the financial officer That berated the Chic Fil a employee? Last I heard, about 3 months ago he still could not find a job. Lost his house, he and his wife have been on welfare. Wise old army saying, dont sh-t in your mess kit.