The statute of limitations on assault with a deadly weapon is typically three to six years under state law and five years under federal law, though the exact deadline depends on where the crime happened and how the offense is classified. A few states allow significantly longer, and at least one imposes no deadline at all. Because the offense is almost always a felony, the filing window runs longer than it would for a simple misdemeanor assault, but it is not open-ended the way murder prosecutions typically are.
How State Deadlines Work
Most states give prosecutors three to six years from the date of the offense to file charges. Several allow longer. Alaska provides ten years for felony assault cases. Mississippi has no statute of limitations for aggravated assault, meaning charges can be brought at any point regardless of how much time has passed.
The deadline often depends on how the state classifies the specific felony. A state that distinguishes between first-degree and second-degree felonies may give prosecutors four years for one and six for the other. Where assault with a deadly weapon is a “wobbler,” meaning prosecutors can charge it as either a felony or a misdemeanor based on the facts, the applicable limit depends on which charge they actually file. A misdemeanor filing triggers a shorter clock.
Some states use the label “aggravated assault” instead of “assault with a deadly weapon.” If you are checking the deadline in your own state, search both terms. The statute of limitations section of the state criminal code sets the deadline based on the offense classification or the maximum possible sentence.
The Federal Five-Year Rule
When the assault occurs on federal property, in federal custody, or against certain federal employees, federal law applies instead of state law. The federal assault statute covers assaults with a dangerous weapon committed within federal maritime and territorial jurisdiction and carries a maximum sentence of ten years in prison.1Office of the Law Revision Counsel. 18 USC 113 – Assaults Within Maritime and Territorial Jurisdiction
The general federal statute of limitations for non-capital offenses is five years. Prosecutors must secure an indictment or file formal charges within five years of the date the crime was committed.2Office of the Law Revision Counsel. 18 USC 3282 – Offenses Not Capital If that window closes without action, the case cannot move forward. The five-year clock covers all federal assault charges, including those involving dangerous weapons, because assault is not a capital offense.
When the Clock Starts
The statute of limitations begins on the date the assault occurred. Unlike some financial crimes or fraud cases where the harm may not surface for months, an attack with a weapon is an event the victim and witnesses are immediately aware of. Courts do not generally apply a discovery rule, which would delay the start of the clock until the crime is detected, to violent assaults. There is nothing hidden about being assaulted. The date of the incident is the trigger, and the countdown runs from there.
Once the filing deadline arrives, the prosecution must have already returned an indictment or filed a formal charging document called an information. Opening an investigation or identifying a suspect is not enough. The formal charge must be on file before the deadline expires.
What Pauses the Clock
The deadline is not always a fixed wall. Under a legal concept called tolling, the clock can be paused when certain conditions exist, effectively giving prosecutors extra time.
- Fleeing the jurisdiction. If the suspect leaves the state to avoid arrest or prosecution, most states pause the statute of limitations for the entire period the person is absent. Federal law goes further: no statute of limitations applies at all to a person fleeing from justice. A suspect who disappears for a decade and then resurfaces can still face federal charges as if no time had passed.3Office of the Law Revision Counsel. 18 USC 3290 – Fugitives From Justice
- Concealing identity. A suspect who uses a false name, disguises their appearance, or takes other active steps to prevent identification may cause the clock to pause until they are identified. This is separate from simply not being caught. The suspect must have done something affirmative to hide.
- Minor victims. When the victim was under 18 at the time of the assault, many states toll the statute of limitations until the victim reaches adulthood. Some extend the deadline further, giving the now-adult victim several additional years.4FBI. Statutes of Limitation in Sexual Assault Cases
Tolling provisions vary significantly by state. Some list additional grounds for pausing the clock, such as when a suspect is imprisoned for a different offense or when the victim has a mental incapacity that prevents them from participating in the process. The common thread is that the delay must be caused by something beyond the prosecutor’s control.
What Happens When the Deadline Expires
Once the statute of limitations runs out, the prosecution is permanently barred from bringing charges for that offense. This is an absolute defense. If a defendant raises it, the court must dismiss the case regardless of how strong the evidence is. The court loses jurisdiction to hear the matter, and no amount of prosecutorial willingness can override the deadline.
The expiration does not depend on whether the case is strong or weak. Even if new evidence surfaces, a confession is obtained, or a witness comes forward, none of it matters once the clock has run. The rule exists to prevent the government from holding the threat of prosecution over someone indefinitely and to make sure cases are built while evidence is still fresh and witnesses can reliably testify.
One wrinkle is worth understanding. The statute of limitations is an affirmative defense, meaning the defendant typically has to raise it. Courts do not always catch it on their own. If charges are filed after the deadline and the defendant fails to object, a conviction could theoretically stand. In practice, any competent defense attorney will check the timeline immediately.
The Civil Deadline Is Shorter and Separate
A criminal prosecution is not the only legal consequence of an assault. The victim can also file a civil lawsuit seeking money damages for medical costs, lost income, pain, and other harms. The criminal case and the civil case are entirely separate proceedings with different standards of proof. A victim can win a civil judgment even if the criminal case results in an acquittal, because civil cases require only a preponderance of evidence rather than proof beyond a reasonable doubt.
The civil statute of limitations for personal injury is almost always shorter than the criminal deadline. Most states set it at two or three years from the date of the injury, with a few allowing as little as one year and others extending it to five or six. A victim who waits for the criminal case to play out before filing a civil suit may find that their own deadline has already passed. Anyone considering a civil claim after an assault should check the personal injury filing deadline in their state right away, because missing it forfeits the right to compensation permanently.