Go on line to every newspaper, where he's been and might be.\nWrite either an editorial letter about wanting to find him, or place an ad online, directed to him or even to directed to someone who knows him. If your padre or someone who knows him sees the ad or letter, you should get a reply of some kind.  Or you can go to 411.com or even the post office. You will have to pay a fee and fill out papers. But with 411.com you just have to buy a report, if the site finds him or someone of his name.