Introduction

Collateral Estoppel in Double Jeopardy

Introduction

The Double Jeopardy Clause of the Fifth Amendment declares that no person shall "be subject for the same offence to be twice put in jeopardy of life or limb."¹ Courts usually apply the Clause by asking whether the second charge is the "same offense" as the first. That inquiry looks past labels, because two crimes can be the same offense for double jeopardy purposes even when they do not share every element.² When the answer is yes, the Clause blocks the later prosecution, and the whole analysis is a comparison between the two charges.

That comparison leaves a gap. A single episode may produce several victims, each of whom supports a separate charge, and the State may try one count, lose, and then bring a count naming a different victim. Different victims mean different offenses, so the same-offense inquiry standing alone gives the defendant no protection. Yet if the second count can succeed only by proving the very fact the first jury rejected, such as that the defendant was one of the participants, the State is asking a second jury to decide what the first jury already resolved in the defendant's favor. A prosecutor who may do that has reason to treat the first trial as a rehearsal, learning which testimony was weak and strengthening it for the next jury, while the defendant must keep defending the same factual question until some jury finally agrees with the State.

The Supreme Court closed the gap in Ashe v. Swenson by reading an issue-preclusion rule into the Double Jeopardy Clause itself, modeled on the collateral estoppel doctrine of civil litigation.³ Under the resulting principle, an acquittal bars a later prosecution if the first verdict resolved in the defendant's favor an ultimate issue of fact that is a necessary element of the prosecution's case in the second.⁴ The criminal version is significantly narrower than its civil counterpart, so much of the work in applying it lies in its limits.⁵ This chapter follows that path in order: the rule and its source, the method a court uses to work out what an acquittal necessarily decided when the jury announced only a general verdict, the points at which the doctrine stops, and the consequences for a prosecutor deciding whether to join related charges in one trial. The first step is the rule itself and the reason the Court found it in the text of the Fifth Amendment.