help location someone!

Hello, I'm a member of the Texas message board, but today I need help finding a friend of my wife's uncle. My wife's grandmother passed away today, and we are trying to locate somone by the name of Marty or Martin Robertson, his last know addreess is in the town of Brookings, SD. 57006. If you know him or know a way to get a hold of him, please have him contact us at [email protected] that's my wife's e-mail address. Thank you for your time. Joe