My question involves defamation in the state of: NJ

I hired a professional to do some work for me. This professional had me sign a contract stating what he would do. He did not do it. He works out of PA. It seems he pretty much never does as a matter of fact. His state board has been investigating him and if you were to Google his name, you would find 100s of complaints and he seems to be a regular on scambook and ripoff. com. In my opionio he needs to be stopped. He took my money ( and money from countless others) So in my writings ti him, I told him I purchased a domain site that, lets call it "the blank group complaints.com. It was my idea to get people who have been ripped off by this person to have a central place to put their complaints and hopefully communicate with each other and get some action. I stated on the site I was not an attorney and I did not work for this company.

Well on top of sending me via internet a bona fide terroristic threat that I filed a Police report with his e mail, he has threatned me with "trademark liable". I think on top of everything else this guy is full of you know what.

Any ideas?