Locating Owner of Abandoned Property

[Riley Johnson]

I am interested in purchasing an abandoned property on my street that appears in good shape and part way through a remodel. By looking at the tax records, it looks like the owner purchased it in 2018 and only made it part way through a remodel before giving up on the property or getting busy. The owner lives about an hour away and owes $3,500 in back taxes. I don't know a better way to reach them but by mail, so I've written a letter.

After waiting a week, do I try to find their number somewhere online or be consistent at write letters every week? I spend some time on Facebook and couldn't find them. There could be more to the story that I don't know about, so I wonder if there is some ideas on how to get ahold of them or what you would do moving forward.