Whether the Sixth and Fourteenth Amendments permitted Alaska to bar cross-examination of a key prosecution witness about his juvenile probation status when the defense offered that evidence to show possible bias rather than to impeach general credibility.
Holding
No. The Confrontation Clause required that Davis be allowed to cross-examine Green about his juvenile probation status insofar as necessary to expose a possible source of bias.
Reasoning
The Confrontation Clause protects more than a defendant's opportunity to face a witness physically. Its central purpose is to secure meaningful cross-examination, the principal means by which a jury tests a witness's perception, memory, truthfulness, and reliability.
A general attack on credibility, such as using a prior conviction to suggest a witness has an untruthful character, differs from an inquiry directed at a particular reason the witness may be biased. A witness's partiality, prejudice, or ulterior motive is always relevant because it bears directly on the weight the jury should give the testimony.
Davis offered Green's probationary status for the latter purpose. Green may have feared that police would suspect him after a stolen safe was found near his home, or that a failure to cooperate could endanger his probation. Those circumstances could support an inference that he made an inaccurate identification of Davis under pressure or to shift suspicion away from himself.
The limited questioning permitted at trial did not adequately develop that theory. Counsel could ask Green whether he felt worried or biased, but could not disclose the underlying facts that made such worry plausible. Without those facts, the jury could view the defense's questions as speculative attacks on an apparently blameless witness rather than as a grounded challenge to a crucial identification witness.
The restriction was especially serious because Green's denial that he had ever been questioned by law enforcement went effectively unchallenged. His juvenile adjudications likely involved police questioning, yet the protective order prevented defense counsel from exposing the basis for doubting that answer. The jury was entitled to the facts from which it could draw its own conclusions about Green's reliability.