Supreme Court rules for Texas death row inmate over IQ claim
U.S. Supreme Court is seen in Washington, U.S., October 3, 2016. REUTERS/Yuri Gripas

The U.S. Supreme Court on Tuesday ruled in favor of a death row inmate convicted of a 1980 Houston murder who argued that Texas used an obsolete standard to assess whether a defendant has an intellectual disability that would preclude execution.

The justices ruled 5-3 that Bobby Moore, 57, convicted at age 20 of fatally shooting an elderly grocery store clerk during a robbery, should get another chance to show in court he is intellectually disabled and thus not eligible for the death penalty.

The Supreme Court ruled in 2002 that the execution of people who are intellectually disabled violates the U.S. Constitution's ban on cruel and unusual punishment. Moore's lawyers contend the state's system for assessing the intellect of defendants has allowed people with genuine intellectual disabilities like their client to be wrongly condemned to death.

(Reporting by Lawrence Hurley; Editing by Will Dunham)