David Hall passed away in 2016. He has been living quietly since he left public life on his way to prison.
Harry Holloway, of the Oklahoma Historical Society, posted this recap..
After the terrible governorships of the late 20s & early 30's, it wasn't until the 1960s that major scandals again surfaced, and then they did so with a vengeance. Three justices of the Oklahoma Supreme Court were removed from office by impeachment or resignation arising from IRS investigations of reports that justices were taking kickbacks for favorable decisions. A powerful former speaker of the Oklahoma House of Representatives, who had been a dominant figure in state government, was convicted and sent to jail as a result of IRS investigations arising from charges that he failed to report income received in return for political favors. Then in 1975 a former governor, David Hall, was convicted, shortly after leaving office, of misusing his powers of office by trying to direct a state retirement fund to help a friend with a loan. Again, federal officials were the chief agents in cleaning up the corruption.