There’s no single answer to how long it takes for a prosecutor to review a case: a straightforward misdemeanor can be resolved in a few days, while a complex felony investigation can sit under review for many months or longer. The biggest variable is custody. If you’ve been arrested and are being held, hard legal deadlines force the prosecutor to move quickly, and in federal court that generally means filing charges within 30 days. If you’re not in custody, the prosecutor can take as long as the statute of limitations allows.
If You’re in Custody, the Clock Is Short
Pretrial detention triggers constitutional and statutory deadlines that don’t exist when someone is free during an investigation. Two clocks matter most.
48 Hours for a Probable Cause Determination
After a warrantless arrest, a judge must review whether police had probable cause to arrest you. The Supreme Court held in County of Riverside v. McLaughlin that this determination is presumptively reasonable if it happens within 48 hours of arrest.1Justia. County of Riverside v. McLaughlin, 500 U.S. 44 (1991) This isn’t the charging deadline itself, but it’s the first checkpoint. If prosecutors can’t show a judge that probable cause existed within that window, continued detention becomes constitutionally suspect.
30 Days to File Federal Charges
Under the Speedy Trial Act, federal prosecutors have 30 days from arrest or summons to file an indictment or information. If no grand jury is sitting in the district during that window, the deadline extends to 60 days.2Office of the Law Revision Counsel. 18 USC 3161 – Time Limits and Exclusions
The 30 days doesn’t always mean 30 calendar days. The statute excludes several categories of time from the count: mental competency evaluations, pretrial motion hearings, interlocutory appeals, transportation between districts, and court-approved continuances where a judge finds the interests of justice outweigh the public’s interest in a speedy trial.3Office of the Law Revision Counsel. 18 U.S. Code 3161 – Time Limits and Exclusions In practice, actual calendar time between arrest and charging can stretch well past 30 days even in federal court.
Most states have their own speedy trial rules or constitutional requirements that impose similar time limits after an in-custody arrest, though the exact number of days varies by jurisdiction.
If the Deadline Passes Without Charges
When the government misses the 30-day deadline (after accounting for excludable time), the charges in the complaint must be dismissed. The judge decides whether the dismissal is with or without prejudice, weighing the seriousness of the offense, the circumstances of the delay, and the impact refiling would have on the justice system.4Office of the Law Revision Counsel. 18 USC 3162 – Sanctions A dismissal without prejudice lets the prosecutor refile, so a missed deadline doesn’t always end the case for good.
If You’re Not in Custody, the Statute of Limitations Is the Outer Limit
When there’s been no arrest and the case is still under investigation, no speedy trial clock is running. Prosecutors can take the time they need to review evidence, consult investigators, and decide whether to charge. The only hard ceiling is the statute of limitations for the offense.
For most federal crimes, that limit is five years from the date of the alleged crime. Capital offenses have no statute of limitations and can be charged at any time.5Office of the Law Revision Counsel. 18 U.S. Code 3281 – Capital Offenses Certain fraud offenses involving financial institutions carry a 10-year limit. State statutes vary widely; many states impose no time limit on murder and set different windows for felonies and misdemeanors.
The clock can also be paused, or “tolled,” under certain conditions. The most common trigger is when the suspect becomes a fugitive from the jurisdiction where the crime occurred. Someone who flees to avoid prosecution can’t simply wait out the timer.
For people under investigation but not arrested, a months-long review is normal. White-collar cases, public corruption investigations, and complex conspiracy cases routinely take a year or more before any charging decision. Without a custody deadline, prosecutors have room to build the strongest possible case rather than rushing.
What Makes One Review Faster Than Another
Two cases with similar charges can move on very different timetables. The main drivers:
- Crime severity and complexity. A shoplifting case with clear security footage might be resolved in days. A multi-defendant fraud scheme with years of financial records and cooperating witnesses can take months of review.
- Forensic evidence backlogs. Cases that hinge on DNA, toxicology, or digital forensics are often bottlenecked by lab capacity. Forensic labs across the country carry DNA backlogs ranging from months to more than a year, and analysis itself can add weeks or months depending on the case. A prosecutor waiting on lab results has no choice but to wait.6National Institute of Justice. How Long Will It Take and When Will the Results Be Available?
- Prosecutor caseload. In busy offices, prosecutors juggle hundreds of open matters. A non-urgent review gets pushed down the stack whenever a case with an in-custody defendant comes in.
- Requests for more investigation. Prosecutors regularly send files back to police asking for additional interviews, more evidence, or clarification. Each round trip adds weeks.
- Multiple defendants or jurisdictions. Co-conspirator cases, especially across state lines or federal districts, require coordination between offices and negotiation over who prosecutes whom.
- Witness cooperation. A reluctant victim or an unavailable key witness can stall a review entirely. Files can sit open indefinitely when the prosecutor can’t lock down needed testimony.
How the Review Ends
Every prosecutor’s review lands somewhere. Knowing the possible outcomes helps make sense of what “done” looks like.
Formal Charges Filed
If the prosecutor concludes the evidence is strong enough to win at trial, they file formal charges. In federal court and many state systems, felony charges go through a grand jury, which reviews the evidence and issues an indictment. For less serious offenses, prosecutors can file a charging document called an “information” or a criminal complaint directly with the court.7United States Courts. Criminal Cases Once charges are filed, the defendant is formally notified and arraigned.
Case Declined
Prosecutors decline cases more often than most people realize. Common reasons include insufficient evidence, problems with how evidence was obtained, witness credibility concerns, or a judgment that prosecution wouldn’t serve the public interest. When a case is declined, the office closes its file.
A declination is not an acquittal. Because double jeopardy only attaches once a trial begins or a guilty plea is entered, a prosecutor who declines can reverse course later, as long as the statute of limitations hasn’t expired. New evidence, a newly cooperative witness, or a change in office priorities can all revive a shelved case.
Sent Back for More Investigation
Sometimes the evidence is close but not enough. The prosecutor returns the file to law enforcement with specific requests: re-interview a witness, get another search warrant, pull additional records. The case stays open with no charges filed. This is where things can quietly drag on for months.
Pretrial Diversion
For some cases, particularly first-time or nonviolent offenders, the prosecutor may offer pretrial diversion. The defendant agrees to conditions such as supervision, community service, or treatment. If they complete the program, charges are never filed or are dismissed. Federal pretrial diversion is governed by the Justice Manual, which prioritizes young offenders, people with substance abuse or mental health challenges, and veterans.8Department of Justice. Justice Manual 9-22.000 – Pretrial Diversion Program Many state and local jurisdictions run their own diversion programs with different eligibility rules.
What to Do While You Wait
The stretch between investigation and a charging decision is one of the more anxious phases of the criminal process, in part because you often have very little information about where things stand.
If you know you’re under investigation or have any reason to believe charges may come, talk to a criminal defense attorney sooner rather than later. Pre-filing representation matters because a lawyer can sometimes contact the prosecutor’s office, present mitigating information, or argue against charges before they’re filed. The dynamics shift once charges are on paper.
In federal investigations, prosecutors sometimes send what’s called a “target letter” to notify someone that they’re a focus of a criminal investigation. If you receive one, hire an attorney immediately and communicate with the government only through your lawyer. Do not destroy documents, delete files, or ask anyone to change their account of events. Those actions can create separate criminal liability for obstruction, even if the underlying investigation goes nowhere.
If you’re the victim of a crime waiting for a charging decision, you can usually contact the prosecutor’s office to ask about status. Victim-witness coordinators in most offices are specifically tasked with keeping victims informed, though they may not share investigative details.
For a misdemeanor review, expect the turnaround to be a matter of weeks. For felonies, especially those involving forensic evidence or financial complexity, patience measured in months is realistic. If the delay seems excessive and you’re represented, your attorney can make inquiries. If you’re in custody and the speedy trial clock is running, your lawyer should be tracking that deadline and prepared to file a motion to dismiss if it’s violated.