1. Whether the Sixth and Fourteenth Amendments permit a state court to bar all cross-examination of a key prosecution witness concerning her own juvenile arrest and case dismissal—evidence directly bearing on bias and motive to fabricate—on the ground that the records are sealed under a state confidentiality statute.

2. Whether such a categorical denial of bias impeachment can ever be deemed harmless beyond a reasonable doubt under Chapman v. California, 386 U.S. 18 (1967), when the witness is central to the prosecution's case and the State's proof of guilt turns on credibility.

Whether the Sixth and Fourteenth Amendments permit a state court to bar cross-examination of a prosecution witness about sealed juvenile records and whether such a denial of bias impeachment can be deemed harmless