How to track down owner of vacant properties.

[John Mills]

We come across properties that are vacant. They need work and taxes have not been paid for 2+ years. City has liens on them for cleanup and unpaid utility bills. They are usually out of state owners. We mail to the address the tax bills go to but no luck. Calling the numbers reaches numbers no longer in service. How can you find the person responsible to make an offer on the property?