No. If you have been acquitted of a crime, the government cannot retry you for that same offense. The Fifth Amendment’s Double Jeopardy Clause makes a not-guilty verdict final, and the prosecution cannot appeal it or ask a higher court to undo it.1Cornell Law School. Fifth Amendment That rule has a few real limits, though, and they catch people off guard: a different government can sometimes bring its own charges, a civil lawsuit over the same conduct is still possible, and a mistrial is not the same thing as an acquittal.
Why an Acquittal Is Final
The Fifth Amendment forbids putting anyone “twice in jeopardy of life or limb” for the same offense. Courts read that language to bar a second prosecution after an acquittal, a second prosecution after a conviction, and multiple punishments for the same crime.
The point of the rule is to keep prosecutors from using the government’s resources to wear a defendant down with repeat trials until a conviction finally sticks. An acquittal shuts that door. Unlike most other rulings in a criminal case, it cannot be appealed. Federal law allows the government to appeal certain dismissals and other orders, but carves out any appeal “where the double jeopardy clause of the United States Constitution prohibits further prosecution.”2Office of the Law Revision Counsel. 18 U.S. Code 3731 – Appeal by United States
The Supreme Court has been blunt about this. Even if a judge made a clear legal mistake that led to the acquittal, there is no do-over. Allowing a second trial after an acquittal, the Court has said, “however mistaken the acquittal may have been, would present an unacceptably high risk that the Government, with its vastly superior resources, might wear down the defendant.”3Congress.gov. Amdt5.3.6.1 Overview of Re-Prosecution After Acquittal
What Counts as an Acquittal
An acquittal is a legal finding of not guilty. It does not mean a court found you innocent. It means the prosecution did not prove its case beyond a reasonable doubt, which is the highest standard of proof in the legal system.4Legal Information Institute (LII) / Cornell Law School. Beyond a Reasonable Doubt For double jeopardy purposes, the distinction does not matter. Either way, you cannot be retried.
Acquittals take more than one form. A jury can return a not-guilty verdict. A judge in a bench trial can find you not guilty. Under Federal Rule of Criminal Procedure 29, a judge can also enter a judgment of acquittal when the prosecution’s evidence is too thin to support a conviction, sometimes before the case ever reaches the jury, and a defendant can ask the judge to set aside a guilty verdict within 14 days and enter an acquittal instead.5Cornell Law School. Federal Rules of Criminal Procedure Rule 29 – Motion for a Judgment of Acquittal All of these carry the same double jeopardy protection.
What “Same Offense” Means
The protection is against retrial for the “same offense.” Prosecutors sometimes try to work around an acquittal by filing a related but technically different charge, so the rule for what counts as the same offense matters.
The Supreme Court set the test in Blockburger v. United States. Two crimes are different offenses only if each one requires proof of a fact that the other does not.6Justia Law. Blockburger v. United States, 284 U.S. 299 (1932) If one charge is just a lesser version of the other with no unique element of its own, the two are the same offense and a second prosecution is barred. Someone acquitted of auto theft, for example, cannot then be prosecuted for joyriding the same car, because joyriding is a lesser included offense that requires no additional proof.7LII / Legal Information Institute. Successive Prosecutions for Same Offense and Double Jeopardy
Double jeopardy also goes a step further through a doctrine called collateral estoppel, or issue preclusion. In Ashe v. Swenson, the Supreme Court held that this doctrine is built into the Fifth Amendment.8LII / Legal Information Institute. Ashe v. Swenson, 397 U.S. 436 (1970) The defendant there was acquitted of robbing one poker player during a holdup; the state then tried to prosecute him for robbing a different player at the same game. The Court shut the second case down. The only real issue at the first trial was whether he was one of the robbers, and the jury had already answered no. The government could not force him to relitigate that same question just by naming a different victim.9LII / Legal Information Institute. Collateral Estoppel (Issue Preclusion) and Double Jeopardy So an acquittal protects you not just from a repeat of the same charge, but from any later prosecution that would require the government to re-prove facts the first jury rejected.
When a Different Government Can Still Charge You
This is the exception that surprises most people. The federal government and each state are considered separate sovereigns, each with its own criminal laws. A single act can violate both, and each sovereign can prosecute independently. An acquittal in state court does not bar federal charges for the same conduct, and a federal acquittal does not bar state charges.10Cornell Law School. Separate Sovereigns Doctrine
The Supreme Court reaffirmed this doctrine as recently as 2019 in Gamble v. United States, where a defendant was prosecuted by both Alabama and the federal government for the same firearm possession.11Cornell Law School. Gamble v. United States The same logic lets two different states each bring charges when conduct crosses state lines and violates the laws of both.
Dual prosecutions are not common in practice. The Department of Justice follows an internal rule known as the Petite Policy, which generally requires sign-off from a senior official before federal prosecutors can bring charges based on conduct already prosecuted in state court, and demands a compelling federal interest left unvindicated by the earlier case. The policy is a self-imposed restraint, not a constitutional one, so it creates no enforceable rights for defendants, but it meaningfully narrows how often the federal government uses its separate sovereign authority.
A Civil Lawsuit Is Still Possible
Double jeopardy applies only to criminal prosecutions. Someone acquitted of a crime can still be sued in civil court over the same conduct, and the reason comes down to the burden of proof. A criminal conviction requires proof beyond a reasonable doubt. A civil plaintiff only has to show the claim is more likely true than not, a standard called preponderance of the evidence.12Legal Information Institute. Preponderance of the Evidence
The gap between those two standards is wide. Evidence that falls short in a criminal trial can still clear the civil bar easily. The best-known example is the O.J. Simpson case, where a criminal acquittal was followed by a civil wrongful death judgment for the same acts. The two outcomes answer different questions at different levels of certainty, so they are not contradictory.
A Mistrial Is Not an Acquittal
A mistrial ends a trial before any verdict is reached, usually because the jury cannot agree (a hung jury) or because a serious procedural problem makes a fair outcome impossible.13Cornell Law School. Mistrial Since no verdict was rendered, the question of guilt was never resolved, and the government can generally retry the case.
When a judge declares a mistrial over the defendant’s objection, retrial is only allowed if there was “manifest necessity” for ending the trial. A hung jury is the classic example and has been accepted as a valid basis for retrial since 1824.14U.S. Reports. United States v. Perez, 22 U.S. (9 Wheat.) 579 (1824) Other qualifying circumstances include a disqualified juror or an event that physically prevents the trial from continuing. The judge is expected to use careful discretion before cutting off the defendant’s chance to get a verdict from the original jury.15Congress.gov. Amdt5.3.4 Re-Prosecution After Mistrial
There is one exception that flips the result. If the prosecutor deliberately provoked the mistrial, hoping for a second shot with a new jury, double jeopardy bars retrial. In Oregon v. Kennedy, the Supreme Court held that when a prosecutor’s misconduct is intended to cause a mistrial, a defendant’s mistrial motion does not waive double jeopardy protection.16Justia Law. Oregon v. Kennedy, 456 U.S. 667 (1982) The defendant has to show the prosecutor acted with the specific purpose of triggering a mistrial. Negligence, or even recklessness, is not enough.
Acquittals Obtained by Fraud
One narrow principle, rarely invoked in modern American courts, holds that an acquittal obtained by bribing the judge or jury can be treated as a nullity. The reasoning is that if the proceeding was corrupted from the start, the defendant was never truly in jeopardy, so a real trial afterward would not count as a second one. The point reflects the underlying premise of the whole doctrine: double jeopardy protects you from a second prosecution after a genuine first one, not after a staged event.