Some question about an address in Padua

Hi everyone! I have a horrible incident in my life. I was going to open a sportive club for children in Padua with my Italian companion.
He asked me for money for documents. And then he disappeared. Now I'm in U.S and I need to send him an official notice. The police of Padua refused to help without the U.S lawsuit. I was told in my PD they can send him an official notice but they need his address. I don't understand why nobody wants to help… Maybe somebody here knows how can I find out the address of a person in Padua?
It's not a spam it's a real life unfortunately. Thank you for you attention!