Guy on Craigslist tried to rob me, How do I get him back?

A guy on Craigslist tried to sell me an iPhone 4S 16GB. It was actually a iPhone 4 8GB (Not a 4s). I told him that I want my money back and that this isn't what he said it was. He told me to hold on while he goes to his car, I followed him to his car. He was starting his car, and for some reason I had a feeling he was about to drive off with my money. I already gave him his phone back.

And he actually was trying to drive off, but here's the miracle. His car wouldn't start and I started becoming more aggressive and yelling for my money back. He was really uncomfortable. And then I told him that I'm about to call the police if he doesn't give me my money back. Soon as I pull out my phone, he hands me back $20 less than what I gave him. I demand the other 20 back and he insisted that all I gave him was 60, when I GAVE HIM $80. I then started dialing 911. He then gave me the other 20 and cussed me out.

I'm so lucky his car didn't start. Karma was on my side. I also cussed him out back. But how do I get him back? I texted him that I got his license plate and that I'm going to report him to the police. I met him at a starbucks. He then plays acts like he didn't do anything. Please, I need to scare this guy, anywhere in the law where I can put this guy in jail? Or at least teach him a lesson?

I would sue him because he was harassing you and also stealing

CAll the cops?

Yes, karma was on your side, but I hope you learned your lesson. Just buy the phone retail. There are so many scam artists on craiglist. You are so lucky to get your money back.