Void sale? Alabama tax certificate

My husband and I recently got into this. We acquired one property in Alabama at a tax auction. Google search shows the property owner at another address has been deceased two years. Wife still lives at other address and son at property that went for auction. From what I  understand wouldn’t this be a void tax sale? 

Looking forward to your input, I know @Denise Evans is the go to in the area. 

Will head to the court house to check records this week as well as using a title search- thinking ProTitle USA 

Thanks!