During a state murder trial, the defendant was denied the opportunity to exercise a peremptory challenge against a female juror because the trial judge erroneously, but in good faith, believed that the defendant’s use of a peremptory challenge violated Batson. The Due Process Clause does not require an automatic reversal of a conviction when a state trial court committed a good-faith error in denying the defendant’s peremptory challenge of a juror and all jurors seated in the trial were qualified and unbiased.