This is a very important case given Florida's complete disregard for the scientific facts that underlie the psychometrics of intelligence tests--in favor of a "bright line" criteria that fails to account for the standard error of measurement (SEM) in IQ scores.
I have previously made a couple of posts re this problem in Florida. These posts can be found here. Together with Kevin Foley, I published an IAP Psychometrics 101 Report (#11) which addresses the issue of the SEM in Atkins cases.
I hope that SCOTUS will recognize the obvious scientific flaws in the Florida Atkins criteria.