A failure to prosecute a criminal case means the prosecutor’s office has decided to stop pursuing charges against the accused, either by never filing them after an arrest or by dropping them at some point before a verdict. It is not a finding of innocence, and in most situations it is not the final word — the charges can often be refiled later, and the arrest stays on the record until someone takes steps to clear it.
Who Decides Not to Prosecute
The decision belongs to the prosecutor, and courts have treated that authority as broad. The U.S. Supreme Court has said the executive branch has “exclusive authority and absolute discretion to decide whether to prosecute a case.” In practice, a prosecutor can look at a police report and decline to file, or file charges and later abandon them, weighing the seriousness of the offense, the strength of the evidence, the defendant’s background, and whether prosecution serves the public interest.
The formal mechanism for dropping a filed case is called nolle prosequi, Latin for “not to wish to prosecute.” It can be entered any time after charges are filed and before a verdict or plea. A nolle prosequi is not an acquittal, so on its own it does not prevent the government from re-indicting the defendant later. 1Legal Information Institute. Nolle Prosequi
Why Prosecutors Drop Cases
The Evidence Won’t Meet the Standard
Criminal convictions require proof beyond a reasonable doubt, a constitutional requirement rooted in the Due Process Clause. 2Legal Information Institute. Burden of Government of Guilt Beyond a Reasonable Doubt When the available proof cannot realistically clear that bar — no physical evidence tying the suspect to the scene, a single shaky eyewitness — an experienced prosecutor declines to file rather than lose in front of a jury.
Evidence Gets Suppressed or Compromised
Sometimes the evidence exists but the court will not let the jury see it. The exclusionary rule bars the government from using evidence obtained through unconstitutional means, such as a warrantless search that does not fit a recognized exception. 3Legal Information Institute. Exclusionary Rule When the suppressed material was the backbone of the case, the drugs in the trunk or the weapon in the closet, there may be nothing left to prosecute with. A broken chain of custody, contaminated samples, or lost evidence can produce the same result.
Witnesses and Victims Become Unavailable
A case that looks strong on paper can collapse when the people needed to testify are unwilling or unreachable. Witnesses move, die, or refuse to cooperate. Victims sometimes recant or ask that the case not go forward, particularly in domestic violence situations. The prosecutor makes the final call, not the victim, but a case built on one person’s testimony becomes nearly impossible to win when that person will not take the stand.
Exculpatory Evidence Surfaces
Under the Brady rule, prosecutors must disclose material evidence favorable to the defendant, whether or not the defense asks for it. This covers evidence that undermines a prosecution witness, points to another suspect, or would reduce a sentence. 4Legal Information Institute. Brady Rule When Brady material genuinely cuts against the theory of the case, dropping the charges is often the ethical response.
A Grand Jury Refuses to Indict
Serious federal charges, and many serious state charges, require a grand jury’s approval. When a grand jury votes down a proposed indictment, the result is called a “no bill.” 5United States District Court, Eastern District of Missouri. Handbook for Federal Grand Jurors The prosecutor cannot proceed on those charges through that grand jury, though in some jurisdictions the case can be brought before a new grand jury with additional evidence.
With Prejudice or Without Prejudice
When a case is formally ended, the dismissal takes one of two forms, and the difference matters enormously.
A dismissal without prejudice ends the current case but lets the prosecutor refile the same charges later. This is the more common outcome and usually happens when the problem is temporary: a witness who might be located, forensic testing still pending, or an investigation that needs more time. Refiling is only possible while the statute of limitations is still running. For most federal offenses, that window is five years from the date of the crime; capital offenses and certain terrorism crimes have no time limit.
A dismissal with prejudice is permanent. The defendant can never be charged again for the same conduct. Courts generally reserve this outcome for serious problems: constitutional violations, prosecutorial misconduct, or repeated failures to bring the case to trial within required time limits.
Can the Charges Come Back?
Many defendants assume the Fifth Amendment’s protection against double jeopardy prevents the government from trying again once charges are dismissed. The clause bars putting a person “twice in jeopardy of life or limb” for the same offense. 6Constitution Annotated. US Constitution Fifth Amendment The timing is what trips people up. Jeopardy does not attach at arrest, at charging, or at a preliminary hearing. In a jury trial, jeopardy attaches when the jury is sworn. In a bench trial, it attaches when the first witness is sworn.
A failure to prosecute almost always happens before either of those moments, so double jeopardy has never attached and offers no protection against refiling. The one situation where a pre-trial dismissal blocks re-prosecution is a dismissal with prejudice, which functions as a court-ordered bar.
Speedy Trial Rights If Charges Are Refiled
If the government drops charges and later brings them back, the clock protections still apply. Under the federal Speedy Trial Act, trial must begin within 70 days of the indictment or the defendant’s first court appearance, whichever comes later. 7Office of the Law Revision Counsel. 18 US Code 3161 – Time Limits and Exclusions If the government misses that deadline, the defendant can move to dismiss, and the court decides whether the dismissal is with or without prejudice. 8Office of the Law Revision Counsel. 18 USC 3162 – Sanctions
The Sixth Amendment adds a separate constitutional right to a speedy trial. Courts weigh the length of the delay, the reason for it, whether the defendant asserted the right, and how the delay damaged the defense. 9Justia US Supreme Court. Barker v Wingo 407 US 514 1972 A prosecutor who drops charges and then sits on them for years before refiling can face challenges on both statutory and constitutional grounds.
The Arrest Stays on Your Record
This is where a dropped case blindsides people. When charges are dismissed or never filed, the arrest itself remains. It will show up on background checks for jobs, housing, and professional licenses. Employers and landlords see the arrest and the original charge, and the fact that nothing came of the case may not be obvious to them or may not change their decision.
Clearing the record takes affirmative action. There is no automatic process. In most states, you file a petition for expungement or record sealing with the court in the jurisdiction where the arrest happened, pay a filing fee, and attend a hearing. The rules vary widely. Some states make expungement straightforward when no conviction resulted; others impose waiting periods or restrict eligibility by offense type. Filing fees range from nothing to several hundred dollars, and many courts offer fee waivers for low-income petitioners.
At the federal level there is no general expungement statute. Someone arrested for a federal crime but never charged may have no formal way to clear that record. If your case involved federal charges, an attorney familiar with the practice in your specific federal district can tell you what limited options exist.
If You Are the Victim
Federal law gives crime victims specific rights, including the right to be informed of a plea bargain or deferred prosecution agreement, the right to confer with the prosecuting attorney, and the right to proceedings free from unreasonable delay. 10Office of the Law Revision Counsel. 18 US Code 3771 – Crime Victims Rights Most states have parallel notification laws. A prosecutor should notify you before dropping a case, though enforcement of these requirements is uneven in practice.
A dismissed criminal case does not prevent a civil lawsuit, and the standards are different. Criminal cases require proof beyond a reasonable doubt. A civil suit only requires a preponderance of the evidence, meaning the plaintiff’s version is more likely true than not. 11Legal Information Institute. Beyond a Reasonable Doubt Evidence that fell short in criminal court can be more than enough to win a civil judgment for medical bills, lost income, and other damages.
Many states also run victim compensation funds covering out-of-pocket costs like medical care and counseling. Eligibility rules differ, but several states allow victims to apply even when the criminal case was dismissed or no arrest was ever made. The usual requirement is that the crime was reported to law enforcement within a set time frame, not that anyone was convicted.
Deferred Prosecution Is Not the Same Thing
Not every case that ends without a conviction is a failure to prosecute. In a deferred prosecution agreement, the prosecutor pauses the case while the defendant completes conditions such as community service, counseling, restitution, drug treatment, or a clean record for a set period. Meeting every condition leads to dismissal. Falling short means prosecution resumes. During the compliance period, the charges are not being actively pursued, but they have not been abandoned either. Victims retain the right to be notified of any deferred prosecution agreement under federal law.