Finding a missing owner

[Paul Vail]

Hey folks -- I've searched the forums, but have only found ideas on developing lists of out-of-state owners.   I have my eyes on some property that is derelict, and the best my googling can find is the owner may be in an adjoining state.   However, finding his actual contact information is eluding me.   Searching the public records thus far has me stymied.  Should I use a private investigator?  Are there resources that a RE agency may have/use that isn't something we the general public are clueless about?   I appreciate any thoughts, even the simple ones I'll face-palm when I read them.   Thank you.