In the case of Aldridge v. United States in 1930, the Supreme Court ruled on whether or not a defendant's rights were violated when he was denied an opportunity to question potential jurors about possible racial bias during jury selection. The defendant, Mr. Aldridge, who was African American, had been convicted for murder by an all-white jury and appealed his conviction on the grounds that he should have been allowed to ask prospective jurors if they held any racial prejudice against him due to his race. The Supreme Court agreed with Mr. Aldridge and overturned his conviction in a landmark decision that established important precedents regarding racial discrimination within juries. The court stated that it is crucial for defendants to be able to inquire about potential biases among jurors as part of their constitutional right to a fair trial by an impartial jury under the Sixth Amendment. This ruling highlighted how systemic racism can impact legal proceedings and emphasized the importance of ensuring fairness and impartiality within criminal trials.

In the dissenting opinion for Aldridge v. United States, Justice Oliver Wendell Holmes Jr. argued that the defendant's rights were violated due to racial prejudice in jury selection. He believed that it was a fundamental right of every person accused of a crime to be tried by an impartial jury and this principle should apply regardless of race or color. The exclusion of African Americans from the jury pool, he contended, constituted a clear violation of this basic right and thus rendered the trial unfair and unjust. Furthermore, he asserted that such discrimination not only harmed individual defendants but also undermined public confidence in the justice system as a whole.