Double Jeopardy in Trinidad and Tobago: The Rule Against Being Tried Twice
In Trinidad and Tobago, a person who has already been acquitted or convicted of a criminal offence cannot — as a general rule — be tried again for that same offence. This protection is enforced through the pleas of autrefois acquit and autrefois convict under Section 33 of the Criminal Procedure Act, Chapter 12:02 of the Laws of Trinidad and Tobago, and is reinforced by the constitutional right to a fair trial and the right to liberty under Section 4 of the Constitution of the Republic of Trinidad and Tobago, Chapter 1:01. The rule is ancient, rooted in the common law maxim nemo debet bis vexari pro una et eadem causa — no person should be troubled twice for the same cause. However, following the Miscellaneous Provisions (Criminal Proceedings) Act 2021, Parliament created two statutory exceptions: a retrial on new and compelling evidence, and a retrial where an acquittal was tainted by interference or intimidation. As of April 2026, these exceptions apply only to serious offences listed in Schedule 1 of the Supreme Court of Judicature Act — including murder, rape, and human trafficking.
The Foundation of the Rule: Common Law and the Constitution
The double jeopardy rule in Trinidad and Tobago is not merely a procedural technicality. It reflects a fundamental value of the criminal justice system: that the State, with all its resources, should not be permitted to keep trying a citizen until it obtains the result it wants. Once a court of competent jurisdiction has pronounced finally on guilt or innocence, that pronouncement stands.
At common law, the principle was absolute: a final verdict — whether of acquittal or conviction — was a complete answer to any subsequent prosecution for the same offence. This rule passed into the statute law of Trinidad and Tobago through Section 33 of the Criminal Procedure Act, Chapter 12:02, which preserves and codifies the ancient pleas of autrefois acquit and autrefois convict.
The constitutional dimension reinforces the protection. Section 4 of the Constitution of the Republic of Trinidad and Tobago, Chapter 1:01 guarantees the right to liberty and the right to equality before the law. Courts in Trinidad and Tobago have interpreted these rights as encompassing the right to finality in criminal proceedings — the principle that an accused, once finally dealt with by the courts, should be secure from further prosecution for the same matter.
The governing rule: under Section 33 of the Criminal Procedure Act, Chapter 12:02, a person who has been finally acquitted or convicted of an offence is entitled to plead that acquittal or conviction as a complete bar to any subsequent trial for the same offence before any court in Trinidad and Tobago.
The Two Pleas: Autrefois Acquit and Autrefois Convict
The double jeopardy rule operates through two formal pleas — autrefois acquit and autrefois convict — each of which, if successfully raised at the outset of a second trial, brings that trial to an immediate halt.
| Autrefois Acquit | Autrefois Convict | |
|---|---|---|
| Meaning | "Previously acquitted" | "Previously convicted" |
| Basis | The accused was tried and found not guilty of the same offence | The accused was tried and found guilty of the same offence |
| Who raises it | The accused, at the commencement of the second trial | The accused, at the commencement of the second trial |
| Effect if upheld | The second prosecution is permanently stayed | The second prosecution is permanently stayed |
| When it must be raised | Before pleading to the new charge — failure to raise waives the right | Before pleading to the new charge — failure to raise waives the right |
| Standard of proof | The accused must prove, on the balance of probabilities, that the first proceedings were final | The accused must prove, on the balance of probabilities, that the first proceedings were final |
A third bar also exists: a royal pardon. Where the Crown has granted a pardon in respect of an offence, that pardon operates as a bar to any subsequent prosecution for that offence, just as a formal acquittal would.
Timing: When Must the Plea Be Raised?
Both pleas must be raised at the commencement of the second trial — that is, before the accused enters a plea to the new indictment. If the accused fails to raise the plea at that point and instead enters a plea of guilty or not guilty to the new charge, the right to plead autrefois acquit or autrefois convict is waived. Courts in Trinidad and Tobago have been strict on this procedural requirement: the protection, though constitutionally grounded, must be actively claimed in the prescribed manner.
The rule on timing: a plea of autrefois acquit or autrefois convict must be raised before the accused pleads to the new charge — failure to raise the plea at that stage operates as a waiver, and the accused cannot revive it at a later stage of the proceedings.
The "Same Offence" Requirement
The double jeopardy bar applies only where the accused is being tried for the same offence as that for which they were previously tried. This raises a critical question: when is an offence "the same"?
The test is both legal and factual. The second charge must allege the same criminal act and the same legal elements as the first. It is not sufficient that the two charges arise from the same incident. A person acquitted of murder in connection with a particular death is not automatically protected from being charged with manslaughter arising from the same death — because manslaughter and murder are different offences with different legal elements, even though they both concern the same fatal act.
This distinction was addressed in the leading Trinidad and Tobago authority, The State v Brad Boyce (Cr.A. No. 89 of 1998, Court of Appeal; [2006] UKPC 1, Privy Council). The case was a landmark ruling reaffirming double jeopardy protections in the jurisdiction. The Director of Public Prosecutions sought to appeal an acquittal on a manslaughter charge. The Privy Council rejected the DPP's appeal, holding that the prosecution cannot appeal an acquittal at the Court of Appeal level — to permit such an appeal would itself violate double jeopardy by subjecting the accused to a second round of criminal proceedings on the same matter. The State v Brad Boyce remains the leading authority in Trinidad and Tobago on the limits of prosecutorial power once an acquittal has been entered.
The rule on identity of offence: the double jeopardy bar is only engaged where the second charge is for the same offence — in both its factual and legal elements — as the offence for which the accused was previously tried; a charge for a different but overlapping offence arising from the same events does not automatically attract the bar.
What Double Jeopardy Does NOT Prevent
The rule against double jeopardy is not without limits, and its scope is sometimes misunderstood. It is important to identify what the rule does not prevent:
1. A retrial ordered by the Court of Appeal after quashing a conviction. Where a convicted person successfully appeals and the Court of Appeal quashes the conviction and orders a retrial, the accused has not been "finally acquitted" — the original conviction has been set aside on a procedural or legal ground, not on the merits of innocence. A retrial in these circumstances does not engage the double jeopardy bar. This was affirmed in Kester Benjamin v The State (Crim App. No. 54 of 2008, Court of Appeal 2008).
2. A prosecution for a different offence arising from the same facts. As noted above, where the second charge is legally different — even if factually connected — the bar may not apply. In Paul Seerattan v The State (Crim App. No. 32 of 2013, Court of Appeal 2013), the Court of Appeal considered the scope of the protection in the context of overlapping charges and confirmed that the identity of offence — not the identity of facts — is the determining criterion.
3. Civil proceedings. The double jeopardy rule is a rule of criminal procedure. It has no direct application to civil claims, which are governed by the separate doctrine of res judicata. A person acquitted of a criminal charge may still face a civil action for the same underlying conduct — as in the case of a person acquitted of causing death by dangerous driving who is nonetheless sued in a civil negligence claim.
4. Disciplinary or regulatory proceedings. A criminal acquittal does not bar disciplinary proceedings before a professional body or employer for the same underlying conduct.
The 2021 Reform: Two Statutory Exceptions
Prior to 2021, the double jeopardy rule in Trinidad and Tobago was absolute: once an accused was finally acquitted, no further prosecution was possible regardless of what evidence subsequently emerged. This changed with the passage of the Miscellaneous Provisions (Criminal Proceedings) Act 2021, which introduced two carefully circumscribed exceptions for the most serious categories of offence.
The reform followed the approach adopted in England and Wales under the Criminal Justice Act 2003 and drew on recommendations for modernising the criminal justice response to high-profile acquittals in cases where advances in forensic science — particularly DNA technology — had produced compelling new evidence after the original trial.
Exception 1: New and Compelling Evidence
The first exception allows the Director of Public Prosecutions (DPP) to apply to the Court of Appeal to quash an acquittal and order a retrial where new and compelling evidence has emerged that was not available at the time of the original trial.
Evidence is "new" if it was not adduced at the original trial — whether because it did not exist at the time, was not then known to investigators, or was not reasonably available to the prosecution.
Evidence is "compelling" if it satisfies three cumulative conditions: (a) it is reliable; (b) it is substantial; and (c) in the context of the outstanding issues in the case, it is highly probative of the guilt of the acquitted person.
Both conditions — new and compelling — must be satisfied. Evidence that is merely new (for example, a witness who was not called) but not compelling will not suffice. Evidence that is compelling but was in fact available at the original trial (and simply overlooked or not used) also will not suffice.
The governing rule: under the Miscellaneous Provisions (Criminal Proceedings) Act 2021, the DPP may apply to the Court of Appeal to quash an acquittal and order a retrial only where the evidence is both "new" — not adduced at the original trial — and "compelling" — reliable, substantial, and highly probative of guilt.
The Mandatory Pre-Investigation Procedure
The 2021 Act does not permit the police to simply begin investigating an acquitted person on the off-chance that new evidence might emerge. A strict procedural precondition governs the commencement of any investigation:
- The Commissioner of Police must apply in writing to the DPP before commencing any investigation into an acquitted person.
- The DPP must give written consent to the investigation.
- The DPP must be satisfied, before giving consent, that there exists a reasonable basis to believe that new and compelling evidence may come to light.
In circumstances of genuine urgency, an officer not below the rank of Senior Superintendent may authorise an investigation to begin without first obtaining the DPP's written consent — but must report to the DPP immediately and obtain written consent as soon as practicable. This safeguard prevents urgent operational decisions from circumventing the DPP's oversight role.
The pre-investigation rule: no investigation of an acquitted person may commence under the 2021 Act without the written consent of the DPP — and only the Commissioner of Police, or a Senior Superintendent in an emergency, may initiate the request.
Exception 2: Tainted Acquittal
The second exception operates differently. It applies where the acquittal itself was obtained by criminal conduct — specifically, by interference with or intimidation of a juror, a witness, or the judge.
Where the DPP can establish that an acquittal was tainted in this way, the DPP may apply to the Court of Appeal to quash the tainted acquittal and order a retrial. The same written consent procedure applies: the Commissioner of Police must seek the DPP's written consent before investigating, and the DPP must be satisfied that there is a basis for the tainted acquittal application.
The logic of this exception is straightforward: an acquittal obtained through jury tampering or witness intimidation is not a legitimate verdict at all. It is the product of criminal subversion of the justice process, and the accused has no legitimate grievance if that fraudulently obtained result is set aside.
The governing rule: where an acquittal in Trinidad and Tobago was obtained by interference with or intimidation of a juror, witness, or judge, the DPP may apply under the Miscellaneous Provisions (Criminal Proceedings) Act 2021 to quash the acquittal and order a retrial — the accused cannot invoke the double jeopardy bar to protect an acquittal obtained through criminal conduct.
Schedule 1 Offences: The Eligible Offences
Both exceptions are limited in scope. They apply only to the serious offences listed in Schedule 1 of the Supreme Court of Judicature Act. As of April 2026, those offences include:
- Murder
- Rape
- Human trafficking
- Other specified serious offences
This limitation is deliberate. Parliament declined to extend the retrial power to all offences — reserving it for cases where the public interest in justice is strongest, and where the gravity of the offence most clearly justifies the exceptional intrusion on the finality principle.
The 2021 Reform at a Glance: Pre- and Post-Reform Comparison
| Pre-2021 Rule | Post-2021: New Evidence Exception | Post-2021: Tainted Acquittal Exception | |
|---|---|---|---|
| Rule | Acquittal is absolute bar to retrial | Acquittal may be quashed by Court of Appeal | Acquittal may be quashed by Court of Appeal |
| Exception | None | New and compelling evidence | Acquittal obtained by interference/intimidation |
| Who applies | N/A | DPP applies to Court of Appeal | DPP applies to Court of Appeal |
| Conditions | N/A | Evidence must be new + compelling + not adduced at original trial | Acquittal procured by criminal interference with juror, witness, or judge |
| Pre-investigation step | N/A | Commissioner of Police must obtain written DPP consent before investigating | Commissioner of Police must obtain written DPP consent before investigating |
| Eligible offences | N/A | Schedule 1 offences only (murder, rape, trafficking, serious offences) | Schedule 1 offences only |
| Court | N/A | Court of Appeal | Court of Appeal |
Double Jeopardy and the Criminal Procedure Rules 2023
The Criminal Procedure Rules 2023 (Legal Notice No. 377 of 2023) introduced significant procedural changes to indictable proceedings in Trinidad and Tobago, including the system of direct filing of indictments at the Criminal High Court and the introduction of Initial Sufficiency hearings before trial. These changes do not alter the substantive double jeopardy rule, but they affect the procedural framework within which a plea of autrefois acquit or autrefois convict would be raised. Under the new rules, a challenge to the indictment — including a double jeopardy plea — must be raised in accordance with the pre-trial procedure established by the Criminal Procedure Rules 2023.
Double Jeopardy vs. Res Judicata: An Important Distinction
Double jeopardy is sometimes confused with res judicata, which is a civil law doctrine. Both concepts reflect the principle of finality in litigation, but they operate in different spheres.
| Double Jeopardy | Res Judicata | |
|---|---|---|
| Applies in | Criminal proceedings | Civil proceedings |
| Effect | Bars a second criminal prosecution | Bars a civil claim already decided by a court |
| Source | Criminal Procedure Act, Ch. 12:02; common law; Constitution | Common law; civil procedural rules |
| Who invokes it | The accused in the second criminal trial | A defendant in a second civil action |
A person acquitted of criminal assault may still be sued in civil proceedings for trespass to the person arising from the same act. The criminal acquittal does not bar the civil claim — the two proceedings are legally distinct, governed by different standards of proof and different rules of finality.
What the Law Says in Trinidad and Tobago
| Statute | Relevance |
|---|---|
| Criminal Procedure Act, Chapter 12:02 | Section 33 governs the pleas of autrefois acquit and autrefois convict — the formal procedural mechanism for raising the double jeopardy bar in any second prosecution |
| Constitution of the Republic of Trinidad and Tobago, Chapter 1:01 | Section 4 guarantees the right to liberty and equality before the law, which courts have interpreted as encompassing the constitutional protection against double jeopardy |
| Miscellaneous Provisions (Criminal Proceedings) Act 2021 | Introduced the two statutory exceptions to the double jeopardy rule: (1) new and compelling evidence; and (2) tainted acquittal; and established the mandatory DPP consent procedure |
| Supreme Court of Judicature Act (Schedule 1) | Lists the Schedule 1 offences (including murder, rape, and human trafficking) eligible for retrial under the 2021 exceptions |
| Criminal Procedure Rules 2023 (Legal Notice No. 377 of 2023) | New procedural rules for indictable proceedings, including direct filing at the Criminal High Court and Initial Sufficiency hearings — the framework within which double jeopardy pleas are now raised |
Frequently Asked Questions
Can you be tried twice for the same crime in Trinidad and Tobago?
As a general rule, no. Under Section 33 of the Criminal Procedure Act, Chapter 12:02, a person who has been acquitted or convicted of a criminal offence is protected from being tried again for that same offence. This protection operates through the pleas of autrefois acquit (previously acquitted) and autrefois convict (previously convicted), which must be raised at the commencement of any second trial. The protection is reinforced by the constitutional rights to liberty and equality before the law under Section 4 of the Constitution of the Republic of Trinidad and Tobago, Chapter 1:01. However, since the Miscellaneous Provisions (Criminal Proceedings) Act 2021, two narrow exceptions exist — for new and compelling evidence, and for tainted acquittals — both of which apply only to serious Schedule 1 offences such as murder, rape, and human trafficking.
What is the difference between autrefois acquit and autrefois convict?
Both pleas are formal defences that a person facing a second prosecution may raise to have the proceedings stopped. Autrefois acquit means "previously acquitted" — the accused pleads that they were tried for the same offence and found not guilty. Autrefois convict means "previously convicted" — the accused pleads that they were tried for the same offence and found guilty. In either case, the second prosecution is barred. Both pleas must be raised at the start of the second trial, before the accused pleads to the new charge. Failure to raise the plea at that stage waives the protection, and the accused will then be required to face the new proceedings. The pleas are preserved in Section 33 of the Criminal Procedure Act, Chapter 12:02, and a royal pardon operates as an equivalent bar to either plea.
What changed in 2021 regarding double jeopardy in Trinidad and Tobago?
The Miscellaneous Provisions (Criminal Proceedings) Act 2021 reformed the double jeopardy rule by creating two statutory exceptions that had not previously existed in T&T law. Before 2021, the rule was absolute: once acquitted, an accused could never be retried regardless of what new evidence emerged. After 2021, the Director of Public Prosecutions may apply to the Court of Appeal to quash an acquittal and order a retrial in two situations: (1) where new and compelling evidence emerges that was not available at the original trial; or (2) where the acquittal was obtained through interference with or intimidation of a juror, witness, or the judge. Both exceptions are subject to strict procedural requirements — including written DPP consent before any investigation begins — and are limited to serious offences listed in Schedule 1 of the Supreme Court of Judicature Act, such as murder, rape, and human trafficking.
Can the Director of Public Prosecutions appeal an acquittal in Trinidad and Tobago?
The DPP cannot use a straight appeal to reverse a jury acquittal and effectively try the accused a second time — this is precisely what the double jeopardy rule prevents. The Privy Council confirmed this in The State v Brad Boyce ([2006] UKPC 1), the leading Trinidad and Tobago authority on the subject, where the DPP's attempt to appeal a manslaughter acquittal was rejected on the ground that such an appeal would itself violate the double jeopardy protection. However, since the 2021 reform, the DPP now has a separate, specific statutory pathway: an application to the Court of Appeal to quash an acquittal under the Miscellaneous Provisions (Criminal Proceedings) Act 2021, where the strict conditions for new and compelling evidence or tainted acquittal are met. This is not an appeal against the verdict — it is a distinct statutory procedure with its own preconditions and safeguards.
Does being acquitted of murder protect you from being charged with manslaughter for the same death?
Not automatically. The double jeopardy bar applies only where the second charge is for the same offence — in both its factual and legal elements — as the offence for which the accused was previously acquitted. Murder and manslaughter are different offences: they carry different elements, different mental requirements, and different penalties. A person acquitted of murder is not necessarily protected from a subsequent charge of manslaughter arising from the same death, provided the manslaughter charge is truly a distinct legal allegation and not simply a relabelled version of the murder charge. The courts in Trinidad and Tobago have held that the identity of the offence — not the identity of the facts — determines whether the double jeopardy bar applies. Each case will depend on its precise circumstances, and anyone in this position should obtain legal advice without delay.
What is a "tainted acquittal" under the 2021 reform?
A tainted acquittal is an acquittal that was obtained through criminal conduct — specifically, through interference with or intimidation of a juror, a witness, or the judge in the original trial. Where the DPP can establish that the acquittal was procured in this way, the DPP may apply to the Court of Appeal under the Miscellaneous Provisions (Criminal Proceedings) Act 2021 to quash the tainted acquittal and order a retrial. The rationale is that an accused person has no legitimate claim to the protection of the double jeopardy rule where they (or persons acting on their behalf) corrupted the process that produced the acquittal. The tainted acquittal exception applies only to Schedule 1 serious offences, and the same pre-investigation procedure — requiring the Commissioner of Police to obtain the DPP's written consent before commencing any investigation — applies as for the new and compelling evidence exception.
Does a criminal acquittal prevent someone from being sued in civil court?
No. The double jeopardy rule is a rule of criminal procedure and applies only to criminal prosecutions. It has no direct application to civil proceedings. A person acquitted of a criminal offence may still face a civil action for the same underlying conduct — for example, a person acquitted of causing death by dangerous driving may still be sued in a civil negligence claim by the deceased's family. The civil and criminal systems operate independently, apply different standards of proof (beyond reasonable doubt in criminal proceedings; the balance of probabilities in civil proceedings), and reach separate conclusions. The distinct civil law concept of res judicata governs when a civil claim is barred by a previous civil judgment — it does not interact with or depend on the criminal double jeopardy rule.
What if new DNA evidence emerges after someone has been acquitted of murder in Trinidad and Tobago?
Since the Miscellaneous Provisions (Criminal Proceedings) Act 2021, the emergence of new DNA evidence after an acquittal of murder can potentially support a retrial — but only if a strict procedure is followed. First, the Commissioner of Police must apply in writing to the Director of Public Prosecutions before commencing any investigation. The DPP must give written consent and must be satisfied that the evidence is both new (not adduced at the original trial) and compelling (reliable, substantial, and highly probative of guilt). If those conditions are met, the DPP may apply to the Court of Appeal to quash the acquittal and order a retrial. Murder is a Schedule 1 offence and is therefore eligible. The procedure is designed to prevent fishing expeditions against acquitted persons while ensuring that genuinely compelling new evidence is not simply ignored in the interest of formal finality.
Written by Martin George, Attorney-at-Law. Martin George is the founder and principal attorney of Martin George & Company, with more than 35 years of active legal practice in the courts of Trinidad and Tobago. He is a former Commissioner on the Law Reform Commission of Trinidad and Tobago and a member of the Prime Minister's Constitutional Committee for Internal Self-Government for Tobago. This article is published for general information and public legal education. It does not constitute legal advice. For advice on your specific situation, contact Martin George & Company.
Last reviewed: April 2026