Cintron v. Massachusetts

Whether a defendant asserting a structural error in connection with the denial of his Sixth Amendment right to a public trial " where the defendant and his counsel were concededly unaware that the courtroom had been closed during the entirety of jury selection " must show that he was prejudiced by the courtroom closure on a collateral challenge to his conviction, or, whether prejudice is presumed because the harm from the structural error is "necessarily unquantifiable and indeterminate."