Jury Deadlock & Deliberation Dynamics Explorer

1 12-Juror Deliberation Room

Click buttons to reallocate jurors

Guilty (Murder)

Not Guilty

NG - Insanity (McHoul)

⚡ Unanimity Requirement: 12 of 12 jurors must agree on a single verdict. Current: Impasse (No Verdict).

2 Judicial Bench & Procedural Docket

Impasse Reported

Judge's Procedural Record Deadlock Round: 1 of 2

Foreman Note Received: Jurors state after extensive deliberation that they remain split 7 to 5 between Guilty and Not Guilty by Reason of Lack of Criminal Responsibility (McHoul standard).

Judge's Statutory Options at This Stage:

Active Judicial Delivery Excerpt Model Jury Instructions § 2.120

"In a large proportion of cases, absolute certainty cannot be attained or is not expected. Although the verdict must be the verdict of each individual juror, and not a mere acquiescence in the conclusion of your fellows, yet you should examine the questions submitted with candor and with a proper regard and deference to the opinions of each other..."

Deliberation Escalation Path

1. Initial Chamber Deliberations

Jurors review 100+ exhibits, expert psychiatric testimony, and jury instructions.

2. First Formal Impasse Note

Judge delivers standard supplemental instruction ordering jurors to resume talks.

3. Second Impasse: Tuey-Rodriguez Charge

Statutory limit under M.G.L. c. 234A § 68B before judge can declare mistrial without consent.

4. Final Disposition (Verdict or Retrial)

Unanimous 12-0 verdict or Mistrial declaration without Double Jeopardy bar.

🏛️ The Tuey-Rodriguez Charge

Derived from Commonwealth v. Tuey (1851) & Commonwealth v. Rodriquez (1974), Massachusetts' version of the federal Allen "dynamite" charge urges minority jurors to re-examine their views without surrendering honest convictions.

Anti-Coercion Rule: Judge cannot single out minority jurors or force compromise.
Due Process Limit: Can generally be given only once under strict appellate scrutiny.

🧠 McHoul Insanity Standard

Under Commonwealth v. McHoul (1977), a defendant is not criminally responsible if, as a result of mental disease or defect, she lacks substantial capacity to:

Cognitive Prong: Appreciate the criminality/wrongfulness of her conduct; or
Volitional Prong: Conform her conduct to the requirements of the law (postpartum psychosis defense).

⚖️ Mistrial & Double Jeopardy

When a jury is genuinely hung after statutory deliberation requirements:

Manifest Necessity: A hung jury creates legal necessity to terminate trial without prejudice.
No Double Jeopardy Bar: The Commonwealth retains the full constitutional right to re-try the defendant with a newly empaneled 12-juror jury.

📋 Export Official Deliberation Dossier

Download the real-time record containing juror vote distribution, deadlock round history, active judicial charge, and appellate procedural implications.