Mr Deason, who founded Affiliated Computer Services and sold it to Xerox for more than $6 billion in 2009, picked up the Sandcastle and a neighbouring parcel for $38.9m (US$26m) in the same year.
Robert Roberson was scheduled to be executed last Thursday for the 2002 killing of his 2-year-old daughter Nikki Curtis – who allegedly died from shaken baby syndrome.