Or: Try knocking on the neighbors' doors. Explain that you're interested in buying it--do they know where the owner is? Someone will.
If it's been abandoned for 3 years, it's possible it's been sold by the city or county for back taxes. Someone in the city or county tax assessor's office should be able to answer that.
But try a Realtor before plunging into the bureaucratic thicket yourself. And try door knocking.
Hope that helps.
Please see my blog for tips on buying bank owned homes