When a prosecutor sits down with a police file, the question is not simply whether a crime occurred. The factors prosecutors consider in a charging decision include the strength of the admissible evidence, the seriousness of the offense and the harm to any victim, the accused person’s history and conduct, the public interest and the office’s own priorities, and whether the statute of limitations still permits filing. Federal prosecutors work from a list of nine factors set out in the Department of Justice’s Justice Manual, and state prosecutors apply similar frameworks. An arrest starts the process. The prosecutor’s analysis decides whether it continues.
Whether the Evidence Will Sustain a Conviction
The threshold question is whether the available evidence is strong enough to win at trial. Many people assume prosecutors ask only whether they can meet the “beyond a reasonable doubt” standard. The working test is more practical: federal prosecutors are told to file charges only when they believe the admissible evidence will “probably be sufficient to obtain and sustain a conviction” before an unbiased factfinder.1United States Department of Justice. Justice Manual – Principles of Federal Prosecution Beneath that, professional ethics rules bar any prosecutor from filing a charge they know is not supported by probable cause.2American Bar Association. Rule 3.8 – Special Responsibilities of a Prosecutor
The review starts with whatever investigators hand over: police reports, witness statements, forensic results, surveillance footage, and anything the suspect said. A prosecutor reads it like a trial lawyer. DNA and fingerprints are strong. A confession taken under questionable conditions is a liability. Witness testimony counts for only as much as a jury would actually believe. If the key evidence came from an illegal search, it may be inadmissible, which can gut an otherwise solid case.
Prosecutors can also weigh evidence they reasonably expect to obtain before trial, not only what sits on the desk today. A cooperating witness temporarily unavailable but expected to appear can still factor in.1United States Department of Justice. Justice Manual – Principles of Federal Prosecution When the gaps are real and the evidence is thin, experienced prosecutors decline rather than risk an acquittal or pursue someone they are not confident is guilty.
Seriousness of the Offense and Harm to the Victim
Severity drives attention. A violent assault that put someone in the hospital gets far more aggressive consideration than a minor property offense. The Justice Manual lists “the nature and seriousness of the offense” among the core factors in deciding whether prosecution serves a substantial federal interest.1United States Department of Justice. Justice Manual – Principles of Federal Prosecution
The victim’s experience is part of this. Federal law gives crime victims specific rights, including “the reasonable right to confer with the attorney for the Government in the case” and the right to be treated with fairness and respect for their dignity.3Office of the Law Revision Counsel. 18 U.S. Code 3771 – Crime Victims Rights Prosecutors consider the depth of the physical, financial, or emotional harm. They also assess the victim’s willingness to participate, because reluctant or unavailable victims can make prosecution impractical.
The prosecutor represents the government, not the individual victim, and keeps the final say on whether to charge. But a cooperative victim strengthens the case, and a victim who refuses to participate can make certain charges effectively unprovable. Some offenses, including domestic violence, are handled by dedicated units precisely because victim dynamics shape the case.
The Accused Person’s Background and Conduct
Who the accused is matters, and legitimately so. The Justice Manual directs prosecutors to evaluate “the person’s culpability in connection with the offense” and “the person’s history with respect to criminal activity.”1United States Department of Justice. Justice Manual – Principles of Federal Prosecution A first-time offender who played a bit part sits in a very different position from a repeat offender who organized the activity. Prior convictions signal a pattern, and many jurisdictions have enhanced penalties for habitual offenders that push prosecutors toward charging.
Someone with no record who cooperated with investigators, showed genuine remorse, or tried to make the victim whole may draw a lighter charging decision or be diverted out of the system entirely. Post-offense behavior cuts both ways. Fleeing the scene, destroying evidence, or threatening witnesses invites aggressive charges. Turning oneself in and cooperating gives the prosecutor room to consider alternatives.
Personal circumstances get weight too. The Justice Manual includes “the person’s personal circumstances” among the legitimate factors, which can cover age, mental health, and similar considerations that might make prosecution less appropriate or less fair in a given case.1United States Department of Justice. Justice Manual – Principles of Federal Prosecution
Public Interest and Office Priorities
Even with strong evidence and a serious offense, a prosecutor still asks whether this particular case serves the public interest. They weigh the deterrent effect of a potential conviction, both on the defendant and on others considering similar conduct. They weigh whether the resources required are justified by the likely outcome.
Every office has a finite budget and limited staff. Many offices set priorities that reflect what their community needs: one office may focus on gun violence, another on financial fraud, another on drug trafficking. Cases that match those priorities get more attention and are more likely to be charged. A prosecutor who tried to pursue every provable case with equal vigor would run out of attorneys quickly.
Federal prosecutors face an added threshold. They must find a “substantial federal interest” justifying prosecution, as opposed to leaving the matter to state authorities.1United States Department of Justice. Justice Manual – Principles of Federal Prosecution If state prosecutors can handle it effectively, the federal office may stand down. Where jurisdiction overlaps, a single act can be reviewed by two separate offices, each applying its own priorities.
Statute of Limitations
One factor is a hard cutoff rather than a judgment call. If too much time has passed, the prosecutor is legally barred from filing charges no matter how strong the evidence. For most federal offenses that are not punishable by death, the general deadline is five years from the date of the offense.4Office of the Law Revision Counsel. 18 U.S. Code 3282 – Offenses Not Capital
Specific crimes carry different limits. Many states set no statute of limitations for murder. Federal tax crimes typically carry a six-year deadline. Certain fraud and terrorism offenses have extended or eliminated limitations periods. A prosecutor reviewing a cold case or a newly surfaced crime checks the calendar before anything else. A case with strong evidence and a willing victim is worth nothing if the filing deadline has already run.
This is also why investigative delay has consequences. When law enforcement takes years to build a case, the prosecutor may feel pressure to file before the window closes, even if the investigation is not finished. A suspect who evades detection long enough can escape prosecution entirely on that offense.
Which Specific Charges to File
Deciding to prosecute is only half of it. The prosecutor must also choose which charges to bring, and that decision has large consequences for the potential sentence. When a single incident could support several criminal statutes, the prosecutor decides whether to charge all of them, some of them, or consolidate into one count that captures the core conduct.
The Justice Manual instructs federal prosecutors to ordinarily charge “the most serious offense that is encompassed by the defendant’s conduct and that is likely to result in a sustainable conviction.” At the same time, prosecutors are told to consider whether the resulting sentence would be proportional to the actual seriousness of what happened.1United States Department of Justice. Justice Manual – Principles of Federal Prosecution The rules push toward serious charges and toward fairness at the same time, which is a real tension.
Charge selection also affects plea leverage. A prosecutor who files ten counts when three would be appropriate is engaged in what defense attorneys call overcharging, which pressures defendants into pleading to avoid the risk of conviction on everything. Ethical rules prohibit filing charges greater in number or severity than necessary to reflect the gravity of the offense. The line between aggressive but legitimate charging and overcharging is one of the most contested questions in criminal practice.
Whether Diversion Is a Better Fit
Charging is not always a binary choice between prosecution and walking away. Many offices run pretrial diversion programs that give certain defendants a path to avoid a criminal conviction entirely. The federal program is designed to “ensure accountability for criminal conduct, protect the public by reducing rates of recidivism, conserve prosecutive and judicial resources, and provide opportunities for treatment, rehabilitation, and community correction.”5United States Department of Justice. Justice Manual – Pretrial Diversion Program
A person accepted into diversion agrees to meet set conditions over a set period: drug treatment, mental health counseling, community service, regular check-ins with a probation officer, or restitution to the victim. Successful completion can mean full dismissal, a reduced charge, or a more favorable sentencing recommendation.5United States Department of Justice. Justice Manual – Pretrial Diversion Program Failure sends the person back into the regular process.
Not everyone qualifies. Federal diversion excludes cases involving child exploitation, serious bodily injury or death, use of a firearm, violations of public trust by government officials, and national security crimes, among other categories.5United States Department of Justice. Justice Manual – Pretrial Diversion Program Many state programs apply similar exclusions for violent or sexual offenses. Diversion tends to be more available to first-time offenders, younger defendants, and people with substance abuse or mental health challenges. Participants should expect administrative fees that vary by jurisdiction and can run into the hundreds of dollars.
Limits on the Prosecutor’s Discretion
The charging decision carries enormous power, but that power is not unlimited. The most important constitutional check is the ban on selective prosecution. Under the Equal Protection Clause, a prosecutor cannot single someone out based on race, religion, or another protected characteristic. In United States v. Armstrong, the Supreme Court held that a defendant claiming selective prosecution must show that the government’s policy “had a discriminatory effect and that it was motivated by a discriminatory purpose,” and specifically that “similarly situated individuals of a different race were not prosecuted.”6Legal Information Institute. United States v Armstrong, 517 US 456 (1996)
The standard is deliberately hard to meet. The Court built it as a significant barrier against routine second-guessing of charging decisions, and defendants rarely win on it. The principle still matters. Discretion is not the same as unlimited authority, and a prosecutor who files on one person while ignoring identical conduct by someone of a different race is violating the Constitution even if the charges themselves have evidentiary support.
Internal oversight adds another layer. The Justice Manual requires that charging decisions be reviewed by a supervisory attorney, and that most indictments be accompanied by a written prosecution memorandum explaining why the chosen charges fit.1United States Department of Justice. Justice Manual – Principles of Federal Prosecution The duty is also continuing. If the evidence changes after charges are filed and a charge is no longer appropriate, the prosecutor is expected to dismiss it.
What a Declination Means
A decision not to charge today does not necessarily close the door. If the prosecutor passed because the evidence was too weak, new evidence can reopen the question. A different prosecutor reviewing the same file might land differently. In jurisdictions with overlapping authority, a state prosecutor’s decision to pass does not block a federal prosecutor from filing under federal law, or the other way around.
The real hard limit is the statute of limitations. As long as the filing deadline has not expired, the government keeps the ability to bring charges. For anyone who has been investigated but not charged, the absence of charges today does not guarantee they will never come. Once the limitations period runs, the matter is closed for good on those specific offenses.