Stolen Money?

About three weeks ago I helped a very friendly gentleman in Benin. He had lost a relative and needed a co-signer to gain some capital invested in a local bank. To make a long story short, I wired $2300.00 to him and have not heard from him since. I was supposed to recieve a lump sum of cash (Lets just say, a good return) What can I do? What is the longest you have waited to hear anything back? Can the local police here in Ohio get my money back? I took the money from my wifes and I's joint account without her knowledge. I was going to surprise her with the investment return. Now rent is due and I am worried.