Danny, it has been great messaging you privately! I have had no further luck on my end... I think that the above ideas are solid. You may do a Facebook search or intellus search to find relatives... Once you do that, maybe send letters... I had a similar situation with a house in Las Colinas and I mailed letters, sent FB messages and did a lot of work just to come up empty (I never located the owner)... Beyond that, there were several liens on the property as well so this deal just wasn't meant to be....
Good luck w/ this and I'll see if there is anything else I can find!
-Brian