How to locate an absentee owner

[Dolita Adams]

Hello BP,

I wanted to know if anyone can tell me how to find the current address of an absentee owner?  I was out driving today and I came across a vacant property that I know has been vacant for at least 3 years now.  When I got home I put the property address in my counties property search website, which is pg county in Maryland by the way, and the owners mailing address is the same as the property address, but of course it is not the principle address.  Can anyone tell me where do I go from here?  How can I find the current mailing address?