Deadlocked Juries: Outcomes and Procedures
Understand what occurs when a jury cannot agree, from judicial interventions to mistrials and retrials in criminal cases.
A deadlocked jury, often called a hung jury, occurs when jurors cannot reach the required consensus on a verdict despite extended discussions. This situation halts trials and triggers specific legal protocols to either resolve the impasse or end the proceedings.
Defining a Deadlocked or Hung Jury
In U.S. criminal trials, juries typically must deliver unanimous verdicts for convictions or acquittals. A deadlock arises when jurors’ views diverge irreconcilably, preventing agreement by the necessary margin—usually all 12 jurors in felony cases. Civil cases may require only a supermajority, such as 10 out of 12 or 5 out of 6, depending on jurisdiction.
The term ‘hung jury’ describes this impasse vividly, as the jury ‘hangs’ without resolution. Unlike acquittals, which bar retrial under double jeopardy protections, a hung jury permits prosecutors to retry the case.
- Unanimity rule: Essential in most criminal matters to safeguard defendants’ rights.
- Notification process: The foreperson alerts the judge via note when consensus fails.
- Frequency: Deadlocks happen in about 5-10% of trials, varying by case complexity and charges.
Initial Judicial Interventions
Judges prioritize verdicts to avoid resource waste. Upon deadlock notification, they often instruct jurors to continue deliberating, emphasizing patience and open dialogue without coercion.
In some states, like New York civil trials, judges may summon jurors for encouragement, urging further review regardless of outcome direction. This ‘pep talk’ stresses reaching any fair decision, prompting extended sessions—sometimes hours more.
| Intervention Stage | Typical Action | Jurisdictional Note |
|---|---|---|
| 1st Deadlock Note | Send back for more deliberation | Common nationwide |
| 2nd Deadlock Note | Consult attorneys, consider special charge | NY: Chambers discussion |
| Persistent Impasse | Mistrial declaration | After reasonable efforts |
Special Instructions to Break Deadlocks
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When basic encouragement fails, judges use supplemental charges. The most recognized is the Allen charge, stemming from Allen v. United States (1896), reminding jurors of their duty to deliberate thoroughly while respecting individual convictions.
These instructions urge minority jurors to reconsider without surrendering principled beliefs, and majority ones to review rationales. Variants include ‘dynamite charges’ for stronger impetus, though modern versions avoid coercion risks to prevent appeals.
- Core elements of Allen charge: Promote reexamination, value all views, avoid abandonment of honest beliefs.
- Neutral phrasing: Ninth Circuit prefers balanced language to sidestep reversal.
- Timing limits: Usually given once or twice; overuse signals true deadlock.
In Florida, judges must include language ensuring no juror discards ‘conscientious convictions,’ or risk appellate scrutiny. North Carolina statutes explicitly authorize mistrials for deadlocks but guide charges carefully.
Declaring a Mistrial: When Deliberations Fail
If instructions yield no verdict, judges declare mistrials. This discharges the jury, nullifying the trial without prejudice to retrying. Statutory bases exist, like North Carolina’s G.S. provisions for hopeless deadlocks.
Mistrials waste significant investments—court time, witness testimonies, attorney preparations. Judges resist them, but persistence forces declaration after ‘reasonable time.’
Post-mistrial, no conviction or acquittal occurs, preserving prosecutorial retry options. Defendants remain unconvicted, but jeopardy doesn’t fully attach.
Consequences Following a Mistrial
Prosecutors decide retrial viability, weighing evidence strength, costs, and public interest. Multiple hung juries may deter refiling, especially resource-intensive cases.
Defendants benefit: No jeopardy bar until acquittal or successful prosecution. However, emotional toll and legal fees persist.
- Retrial likelihood: High for serious felonies; lower for misdemeanors.
- New jury: Entirely fresh panel, no prior knowledge carryover.
- Double jeopardy exception: Manifest necessity justifies hung jury mistrials.
Jurisdictional Variations Across the U.S.
Procedures differ by state and federal courts. Federal Ninth Circuit scrutinizes Allen charges for balance. Capital cases diverge: North Carolina mandates life sentences if sentencing juries deadlock.
Civil trials often tolerate non-unanimous verdicts, reducing deadlocks. Rhode Island demands unanimity in criminal matters, mirroring federal standards.
| Jurisdiction | Verdict Requirement | Deadlock Handling |
|---|---|---|
| Federal | Unanimous criminal | Allen charge, then mistrial |
| New York (Civil) | 5/6 jurors | Pep talks, attorney input |
| North Carolina | Unanimous | Statutory mistrial authority |
| Florida | Unanimous | Anti-coercion safeguards |
Preventing Deadlocks: Best Practices
Judges mitigate risks via clear instructions, diverse jury selection, and evidence clarity. Attorneys aid by simplifying arguments. Complex cases with polarized facts heighten deadlock chances.
Appellate courts overturn coercive charges, as in Williams (9th Cir. 2008), where identifying holdouts invalidated proceedings.
Frequently Asked Questions (FAQs)
What causes juries to deadlock?
Diverse backgrounds, conflicting evidence interpretations, or strong personal convictions lead to irreconcilable splits.
Can a deadlocked jury be polled?
Judges rarely poll to avoid pressure; focus remains on further deliberation or mistrial.
How long must juries deliberate before mistrial?
No fixed time; ‘reasonable efforts’ assessed case-by-case, often days.
Does a hung jury mean acquittal?
No, it results in mistrial; prosecutors can retry.
Are Allen charges still used?
Yes, in modified neutral forms to prevent coercion claims.
Implications for Defendants and the Justice System
Hung juries balance efficiency against fair trials. They protect against coerced verdicts but strain resources. Reforms like non-unanimous allowances in some states aim to reduce them, though constitutional challenges persist.
For defendants, they offer second chances without jeopardy bars. Prosecutors must strategize retrials carefully. Overall, the process underscores jury independence’s value.
References
- What Happens When the Jury is Deadlocked and is Unable to come to a Decision — RMFW Law. Accessed 2026. https://rmfwlaw.com/firm-news-resources/legal-terminology/happens-jury-deadlocked-unable-make-decision
- Deadlocked Jury — Legal Information Institute, Cornell Law School. Accessed 2026. https://www.law.cornell.edu/wex/deadlocked_jury
- 31.7 Juror Deadlock — UNC School of Government Defender Manual. Accessed 2026. https://defendermanuals.sog.unc.edu/sites/default/files/pdf/31.7%20Juror%20Deadlock_0.pdf
- What Happens if There is a Hung Jury? — Fully Informed Jury Association. Accessed 2026. https://fija.org/library-and-resources/library/jury-nullification-faq/what-happens-if-there-is-a-hung-jury.html
- The Danger of Deadlock: Coercion in the Courtroom — The Florida Bar Journal. Accessed 2026. https://www.floridabar.org/the-florida-bar-journal/the-danger-of-deadlock-coercion-in-the-courtroom/
- Hung Jury — U.S. Courts (via Wikipedia references). Accessed 2026. https://en.wikipedia.org/wiki/Hung_jury
- Mistrial by Hung Jury — Calcagni Law. Accessed 2026. https://www.calcagnilaw.com/criminal-law/mistrial-by-hung-jury/
- 6.25 Deadlocked Jury | Model Jury Instructions — U.S. Court of Appeals for the Ninth Circuit. Accessed 2026. https://www.ce9.uscourts.gov/jury-instructions/node/904
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