Last week, in Yeager v. United States, the Supreme Court resolved a longstanding tension between two aspects of Double Jeopardy law: the collateral estoppel doctrine, which precludes relitigation of issues previously found in the defendant’s favor, and the hung jury rule, which permits relitigation of charges as to which a jury cannot reach agreement.

Yeager, an Enron employee, was charged with multiple counts of fraud and insider trading.  The counts were factually linked: Yeager’s alleged fraud was that he knowingly participated in making false statements to investors regarding the performance of a new Enron project, while his alleged insider information was his knowledge that the project was not actually going so well.  At trial, the jury acquitted Yeager of fraud, but hung on insider trading.  A long line of Supreme Court cases permits retrial when the jury hangs, and the government indeed sought to take advantage of this Double Jeopardy exception by recharging Yeager with insider trading.

Yeager nonetheless presented a Double Jeopardy defense, invoking the collateral estoppel rule of Ashe v. Swenson.  In Yeager’s view, the first jury necessarily determined that the government failed to prove he knew the falsity of the statements made to investors.  If he did not know about the gap between what investors were told and the actual state of affairs, then the government’s insider trading theory would collapse.  In the government’s view, however, the first jury might have acquitted instead based on doubt about whether Yeager actually participated in making the false statements; uncertainty about what the jury actually decided in its acquittal would preclude application of Ashe.  The district court agreed with the government’s view, but the Fifth Circuit reversed.  The Supreme Court then affirmed, holding that application of the collateral estoppel doctrine was not affected by the seeming inconsistency in the jury’s treatment of the fraud and insider trading counts.

Besides its holding, three aspects of Yeager strike me as worthy of note.