IS this a fraud

A month ago, I did a wire transfer to a friend in aother state to purchase a vehicle. We ended up not buying the vehicle as it is not suitable. Since then, he had disappeared and not return any phone calls. There's only a document to show my wire transfer of funds to him and his partner company.
What should my next step is as I'm loosing sleep over this. I can't believe how a good friend that you have been very kind and thoughtful over the years can suddenly turn on you.