Justice Harlan argued that the Court lacked authority to impose its preferred harmless-error standard on state courts. The Fourteenth Amendment permits federal courts to invalidate state rules that are constitutionally unfair, but it does not grant a general supervisory power to prescribe one of several constitutionally permissible procedural alternatives for state criminal proceedings.
In his view, harmless-error rules concern the integrity and finality of the proceeding as a whole, not the substantive content of any particular constitutional guarantee. A state court’s reasonable application of a constitutionally adequate harmless-error rule should therefore be an independent and adequate state ground, ordinarily beyond Supreme Court review.
Harlan found California’s rule constitutionally adequate. Although California asked whether an error caused a miscarriage of justice and often expressed the inquiry in terms of whether a more favorable result was reasonably probable, he regarded that verbal difference from the Court’s standard as largely insubstantial. California precedent also required reversal for certain especially serious errors, such as improperly obtained confessions.
He also believed the California Supreme Court reasonably found the Griffin error harmless on this record. The prosecution’s evidence was powerful and largely unchallenged: petitioners were connected to the victim shortly before the killing, the victim’s blood was found in their car and on Chapman’s belongings, a similar weapon had been purchased by Chapman and was later carried by Teale, and Teale had made damaging admissions. The jury would inevitably have noticed that neither defendant explained this evidence, so Harlan viewed the prosecutor’s added comments as having only marginal additional impact.
Finally, Harlan warned that the Court’s new rule would undermine state-court finality and force federal courts to reexamine entire state trial records, including through habeas corpus. He believed respect for federalism required federal intervention only when a state harmless-error rule was fundamentally unfair or applied unreasonably to evade a constitutional right.