Mistrial and Retrial After a Hung Jury in Federal Court

Does a Mistrial Bar a Second Federal Trial?

A mistrial does not automatically bar a retrial. The Double Jeopardy Clause applies only when the first jeopardy has “terminated” in a way the clause protects. So the controlling question after an aborted federal trial is not whether the trial ended early, but whether it ended in an event that ends jeopardy, such as an acquittal, or in one that does not, such as a proper mistrial.

The organizing idea is the defendant’s valued right to have the trial completed by the particular tribunal already sworn to judge the case. That interest is real, but it is not absolute. When a compelling problem makes a fair verdict from the first jury impossible, the public interest in a fair trial can require ending the proceeding, and a retrial then follows without offending the clause. Courts call that compelling problem a manifest necessity.

Two variables decide almost every case. The first is who caused the trial to end: a mistrial the defendant requested is treated very differently from one the judge declared over objection. The second is whether, for a mistrial over objection, the record shows a high degree of necessity for stopping the trial. This satellite focuses on the most common scenario for a Frisco-area federal defendant in the Northern or Eastern District of Texas: a first trial that ends in a deadlock or a sudden mistrial, and the question of whether the government gets a second try. The general double jeopardy framework, including when jeopardy first attaches, is covered on the parent motion page.

The Hung Jury: the Classic Manifest Necessity

A deadlocked jury is the oldest and clearest example of manifest necessity. When jurors genuinely cannot agree, the judge may discharge them and set the case for retrial, and that retrial does not violate the Double Jeopardy Clause. The failure to reach a verdict is treated as a non-event: jeopardy simply continues rather than terminating in the defendant’s favor.

The modern authority is Renico v. Lett, where the Supreme Court reaffirmed that a trial judge’s decision to declare a mistrial for deadlock is left to sound discretion and is accorded great deference. The Court stressed that a judge need not force the jury to deliberate for any fixed time, poll the jurors, give a supplemental charge, or obtain counsel’s consent before finding a deadlock. The reason for that latitude is practical: pushing an apparently hung jury harder risks a verdict driven by pressure rather than conviction.

The Fifth Circuit applies the rule the same way. In United States v. Mauskar, the court held that a retrial after a hung jury does not violate double jeopardy and added a useful corollary: because a mistrial renders the first proceedings a legal nullity, a defendant is free to raise motions before the second trial that were not raised before the first. For the defense, that means a deadlock is rarely a dead end on double jeopardy grounds, but it does reset the clock and reopen procedural challenges to the indictment and the government’s theory that can be sharpened for the retrial.

How Much Deference Does the Judge's Call Get?

Not all mistrials are reviewed alike. The Supreme Court has described a spectrum: the more a mistrial looks like a tool to help the prosecution, the harder a reviewing court looks; the more it looks like a neutral response to a problem inside the jury, the more deference the judge’s call receives. Where a case sits on that spectrum often decides the double jeopardy question.

In Arizona v. Washington, the Court set the framework. For a mistrial over the defendant’s objection the prosecutor must show manifest necessity, a “high degree” of necessity rather than literal necessity, and the judge need not recite the words “manifest necessity” so long as the record supports the ruling. The table sorts common bases for a mistrial by the scrutiny they receive and the usual result.

The practical takeaway is that deference is earned by the process on the record. Where the judge heard argument, considered alternatives, and acted to protect the fairness of the verdict, the ruling will usually stand. Where the record shows haste, a tactical benefit to the government, or no real necessity, the deference evaporates and a retrial can be barred.

When a Mistrial Does Bar a Retrial

The mirror image of the hung-jury rule is the mistrial that bars a second trial. When a judge ends the first trial over the defendant’s objection without a manifest necessity, jeopardy has already attached and the clause forbids making the defendant run the gauntlet again. These are the cases where a former-jeopardy motion can end the prosecution.

Two decisions mark the territory. In Downum v. United States, the prosecutor let a jury be sworn without confirming that a key witness was present, then sought a mistrial when the witness could not be found. The Supreme Court held there was no manifest necessity, so the second trial was barred; the government took its chance when it started a trial it was not ready to finish. In United States v. Jorn, the trial judge abruptly discharged the jury on his own to let witnesses consult counsel, without weighing a continuance or the defendant’s interest in a verdict. The Court held that the sua sponte mistrial lacked the scrupulous exercise of discretion manifest necessity requires, and reprosecution was barred.

The common thread is that the government does not get a second try to fix a problem of its own making, and a judge cannot short-circuit the first jury without genuinely considering less drastic options. When the record shows the mistrial served the prosecution’s convenience, followed inadequate preparation, or reflected a snap decision rather than reasoned necessity, the defense has a real argument that the clause bars the retrial. Those facts are built from the trial transcript, the timing of the mistrial, and what the judge said before granting it.

Partial Verdicts and Foreperson Reports

Deadlock cases often involve juries that reached agreement on some charges but not others, or a foreperson who describes a vote during deliberations. Defendants sometimes argue that such a report amounts to an acquittal on the greater charges that must bar retrial. Federal law treats the report cautiously, because only a final verdict, not a mid-deliberation status update, ends jeopardy.

The leading case is Blueford v. Arkansas. There the foreperson reported that the jury was unanimous against guilt on the greater murder charges but deadlocked on a lesser offense, and the jury kept deliberating before a mistrial was declared. The Supreme Court held that the report lacked the finality of an acquittal because deliberations continued and the jury remained free to reconsider, so retrial on the greater charges was not barred. The Court also declined to require trial judges to offer partial-verdict forms before declaring a deadlock mistrial.

The practical answer lies in procedure. Under Rule 31, a jury may return a verdict on some counts and the court may accept a partial verdict, and a defendant who wants to lock in a favorable resolution on particular counts should ask the court to take a partial verdict before the jury is discharged. If the court accepts an acquittal on a count, that acquittal ends jeopardy on it; if the jury merely hangs, the count can be retried. Preserving the record, and asking for the partial verdict on the record, is what separates a protected acquittal from a retriable deadlock.

Procedure, Timing, and the Second Trial

When the government moves to retry a defendant, the former-jeopardy defense is asserted before the second trial by a motion to dismiss the indictment under Rule 12(b). The motion argues that the first jeopardy terminated in a way the clause protects, or that the mistrial over objection lacked manifest necessity, so the retrial is barred.

Timing and record-building drive these motions. Because Mauskar treats a mistrial as wiping the slate for procedural purposes, counsel can raise challenges before the retrial that were not made the first time, including refined multiplicity or sufficiency-framed arguments. The heart of the motion is the record of the first trial: the transcript of the mistrial colloquy, the timing of any deadlock note, the court’s findings, and whether alternatives were considered. Where the government seeks to retry counts after a partial verdict, the defense confirms exactly which counts ended in acquittal and which merely hung.

The stakes justify getting it right early. A double jeopardy bar is not a discretionary balance; where it applies, the second prosecution is forbidden. The federal criminal defense attorneys at L and L Law Group, PLLC in Frisco, Texas, Co-Founding Partners Reggie London and Njeri London, handle criminal motions practice in the Northern and Eastern Districts of Texas. To discuss a specific situation, call (972) 370-5060 or email info@landllawgroup.com. This overview is general legal information, not legal advice, and it does not create an attorney-client relationship.

Where This Fits

This guide is one of four situations that arise under the Motion to Dismiss on Double Jeopardy / Collateral Estoppel. Start with the parent motion for the overall framework, or move to a related fact pattern:

What the Case Law Says

These decisions—verified against primary sources—control how this issue is litigated. Every case still turns on its own facts.

• Arizona v. Washington, 434 U.S. 497 (1978) — A mistrial over the defendant's objection requires the prosecutor to demonstrate manifest necessity, a high degree of necessity, not literal necessity.
• Renico v. Lett, 559 U.S. 766 (2010) — A trial judge's deadlock mistrial is accorded great deference; no minimum deliberation time, juror polling, or supplemental instruction is required first.
• Downum v. United States, 372 U.S. 734 (1963) — No manifest necessity existed where the prosecution let the jury be sworn with a key witness absent; double jeopardy barred the second trial.
• United States v. Jorn, 400 U.S. 470 (1971) — Reprosecution was barred where the judge sua sponte discharged the jury without scrupulously exercising discretion or considering a continuance.
• Blueford v. Arkansas, 566 U.S. 599 (2012) — A foreperson's report of unanimous votes against murder lacked acquittal finality because deliberations continued; retrial on those charges was permitted.
• United States v. Mauskar, 557 F.3d 219 (5th Cir. 2009) — Retrial after a hung jury does not violate double jeopardy; a mistrial renders the first proceedings a nullity, so pre-retrial motions are timely.

General summaries of published opinions for information only — not predictions about any specific case.