Abandoned Home in our Neighborhood - How do I buy it?

[Karen Lovelady]

There is a home in our neighborhood that has been abandoned for over 20 years.  I was able to find info on the owner and she passed away in 2007 - she was nearly 100 years old.  Prior to her passing, she lived in a convalescent home in town.  I found her husband's obituary - which listed his children, but I am having difficulty finding the children (who are most likely in their late 70's now). 

I did find out the name of the person that paid the property taxes last year - but the assessors office would not give me their address.  I did use a search to find info on the person, and I think I found him.  He doesn't seem related to the family, but I am unsure how to proceed. 

Also, the home still has a car in the garage, and it is fully furnished. There is some wear and tear on the outside of the home, but it is in a good neighborhood. I believe it would be a great home to BRRRR or to wholesale for an investor.

Any advice on how I can find out who to make an offer to??

Thank you, Karen