Legal background Texas has been influential in the development of capital punishment jurisprudence in the United States. Important landmark Supreme Court decisions like
Penry v. Lynaugh (1993) have originated in Texas and the state has also come into conflict with the Supreme Court over the implementation of important decisions like
Atkins v. Virginia. The
Atkins decision overturned
Penry by holding that executing the intellectually disabled is unconstitutional because no legitimate penological purpose is served by executing a person who is not able "to learn from experience, to engage in logical reasoning, or to control impulses". The Supreme Court left to the states the "task of developing appropriate ways to enforce the constitutional restriction upon [their] execution of sentences" in the
Ford v. Wainwright (1986) decision prohibiting the execution of insane prisoners; it did the same in
Atkins. Between 2003 and 2011 there were several failed proposals in the Texas Legislature to enact a statutory procedure for
Atkins claims. Texas had the highest volume of
Atkins collateral review claims of any death penalty state at that time. In 2004 the Texas state courts developed interim
Atkins procedures in
Ex parte Briseno. Without an agreed-upon statutory definition of "mental retardation" the
Briseno Court attempted to "define that level and degree of mental retardation at which a consensus of Texas citizens would agree that a person should be exempted from the death penalty". The Court focused on a subset of clinical assessment criteria and invented seven additional evidentiary factors for assessing adaptive functioning deficits.
Case background Bobby James Moore was sentenced to death in 1980 for killing James McCarble during an attempted robbery of a grocery store in
Houston, Texas. After Moore's conviction was upheld by the Texas Court of Criminal Appeals in 1985, he filed a habeas corpus petition claiming
ineffective assistance of counsel in federal court. He was granted a new sentencing hearing in 2001, one year before
Atkins was decided, and was again sentenced to death. Moore did not present any intellectual disability defense at the hearing. Following the state-implemented
Atkins procedure, the state court found that Moore was not intellectually disabled . The United States Supreme Court granted
certiorari. == Decision ==