HUNTSVILLE, Texas (AP) — A North Texas man who experts for both prosecutors and defense attorneys have said is intellectually disabled faced execution Thursday evening for the death of a retired college professor after the U.S. Supreme Court lifted a stay that had put it on hold. If Edward Busby receives a lethal injection as scheduled, he would be the 600th person executed in Texas since the state resumed carrying out the death penalty in 1982. Busby’s execution had been in doubt after the 5th U.S. Circuit Court of Appeals last week had issued a stay to further review his claims of intellectual disability. But the U.S. Supreme Court overturned the stay on Thursday at the request of the Texas Attorney General’s Office. Three of the nine justices on the high court would have allowed the stay to remain, including Justice Ketanji Brown Jackson. “In capital cases, we rarely intervene to preserve life.…