Whether appellate review of a collateral-estoppel ruling is limited to determining whether substantial evidence supports the trial court’s findings.
Holding
No. The sufficiency of the record to establish collateral estoppel, and the fairness of applying it, are questions of law independently reviewed by the appellate court.
Reasoning
The party invoking collateral estoppel must introduce the prior judgment and enough of the earlier record—including pleadings, exhibits, and pertinent transcripts—to show with the necessary certainty that the identical issue was actually decided and was necessary to the prior judgment. If the submitted materials do not establish those matters, estoppel fails.
But the proponent’s burden of proof does not give the trial court’s conclusion special factual deference on appeal. Whether issues are identical and whether an issue was actually decided are legal questions. The Supreme Court therefore independently determines whether the record establishes the elements of preclusion as a matter of law.
Once an identical issue has been shown to have been actually decided, the prior judgment is prima facie conclusive. The burden then shifts to the party resisting estoppel to identify circumstances showing either that it lacked a full and fair opportunity to litigate or that preclusion would otherwise be unfair. Those fairness determinations also involve legal and policy judgments that the Supreme Court reviews independently.