Having Trouble Tracking Down Owners

[John Clark]

I found a house that is obviously vacant and has been for quite some time.  When I look up the tax records the only address for the owners is that property.  I asked around the neighborhood and the only information I got is that it was an inheritance that was being used as a vacation house by the owners and then they just stopped going.  What are means have you all used to track down owners when the trail is cold?