Whether a federal court of appeals may use its supervisory power to reverse criminal convictions for an assumed Griffin violation without applying Chapman harmless-error review.
Holding
No. A court of appeals may not bypass Chapman harmless-error analysis merely by invoking, or implicitly relying on, supervisory power to discipline prosecutors.
Reasoning
Federal courts possess limited supervisory authority to formulate procedural rules and to remedy violations of recognized rights, protect judicial integrity, and deter unlawful conduct. But that authority must be exercised cautiously and with attention to the competing interests at stake.
If an error is harmless, reversal is not needed to remedy the defendant's injury because the conviction would have resulted even without the error. Nor does judicial integrity ordinarily require reversal when there is no reasonable possibility that the challenged practice contributed to the conviction.
Deterrence did not justify reversal here. The prosecutor's remark was, at most, an attenuated Griffin violation, and the court of appeals had less drastic tools available to address improper advocacy, including professional discipline, referral to the Justice Department, or public criticism.
The Seventh Circuit appeared to focus on deterring recurring prosecutorial comments while giving insufficient weight to the interests served by harmless-error review: the prompt administration of justice, the difficulty of retrying an old case, and the serious trauma a retrial would impose on victims of violent sexual crimes. Those interests cannot be disregarded simply to chastise prosecutorial misconduct.