Prosecutorial discretion is the authority a prosecutor holds to decide whether to file criminal charges, which charges to file, how to resolve the case, and what punishment to push for. So long as there is probable cause to believe a statutory offense was committed, the Supreme Court has said the decision to prosecute and what to charge “generally rests entirely in his discretion.”1Justia Law. Bordenkircher v. Hayes, 434 U.S. 357 (1978) In practical terms, that gives prosecutors more influence over how a criminal case ends than judges have in most situations.
The Charging Decision
The most consequential moment in a criminal case usually happens before anyone sees a courtroom. When police hand over evidence, the prosecutor decides whether to file charges at all, and if so, which ones. A single set of facts can support several different charges at different levels of severity. The same bar fight might be charged as aggravated assault or as simple battery, and the choice alone can mean the difference between prison and probation.
Prosecutors are not required to file charges even when the evidence is strong. Cases get declined for reasons that never appear on any public docket: the evidence is technically sufficient but practically shaky, the offense is minor, the defendant is cooperating in a larger investigation, or the office does not want to spend the resources. Courts have consistently upheld this latitude as “broad discretion” over whom to prosecute.1Justia Law. Bordenkircher v. Hayes, 434 U.S. 357 (1978)
Federal prosecutors operate under a Department of Justice policy that instructs them to presumptively charge the most serious, readily provable offense consistent with the defendant’s conduct that is likely to result in a sustainable conviction.2U.S. Department of Justice. Justice Manual 9-28.000 – Principles of Federal Prosecution of Business Organizations That phrasing still leaves wide room for judgment about what counts as “readily provable.” State offices follow their own written policies, which vary considerably from one jurisdiction to the next.
Plea Bargaining
Most criminal cases never go to trial. They end in negotiated pleas, and the prosecutor runs that process. In a typical plea bargain the defendant agrees to plead guilty to some or all charges in exchange for concessions, usually a reduction in the number or severity of the charges or a recommendation for a lighter sentence.3Legal Information Institute. Plea Bargain What to offer, what to demand, and when to walk away all sit with the prosecutor.
The charging decision amplifies this leverage. A prosecutor who initially files the most serious available charges creates significant pressure on the defendant to settle. The Supreme Court has held that it is not unconstitutional for a prosecutor to carry out a threat to bring more serious charges if the defendant refuses to plead, as long as there is probable cause for those charges.1Justia Law. Bordenkircher v. Hayes, 434 U.S. 357 (1978) This is where most defendants feel prosecutorial discretion most directly.
Sentencing Leverage
Even after a conviction, prosecutors continue to shape outcomes through sentencing recommendations. Judges generally give weight to those recommendations, especially under sentencing guidelines. The bigger lever, though, is the charging decision itself, because some charges carry mandatory minimum sentences that bind the judge’s hands.
Federal drug cases are a clear example. Prosecutors can file what is known as an 851 information, a written notice identifying a defendant’s prior drug convictions. Filing that notice automatically triggers enhanced mandatory minimums, sometimes doubling the prison term. The statute requires the notice to be filed before trial or before a guilty plea; without it, the enhanced penalties simply do not apply.4Office of the Law Revision Counsel. 21 U.S. Code 851 – Proceedings to Establish Prior Convictions Whether to file or withhold that notice is the prosecutor’s call alone, and it functions as a powerful bargaining chip. A prosecutor can offer to hold it back in exchange for a plea, or file it to raise the stakes for a defendant who insists on trial.
Critics argue that mandatory minimums effectively shift sentencing power from judges to prosecutors. The charging decision, not the trial outcome, often determines the range of possible punishment.
Dropping or Diverting a Case
Prosecutors can also end a case after it has been filed. A formal dismissal by the prosecutor is called a nolle prosequi, Latin for “not to wish to prosecute,” and it can be entered at any point before a verdict or guilty plea.5Legal Information Institute. Nolle Prosequi Reasons vary: evidence falls apart, a witness stops cooperating, the office rethinks whether the case is worth pursuing.
A dismissal is not an acquittal. A nolle prosequi entered before trial does not stop the prosecutor from bringing new charges later based on a fresh indictment or new information.1Justia Law. Bordenkircher v. Hayes, 434 U.S. 357 (1978) Double jeopardy protections do not attach until a jury is sworn, or in a bench trial until the first witness is called. A dismissed case can resurface.
A more constructive use of this authority is pretrial diversion, which routes eligible defendants out of the traditional criminal process. If the defendant completes specified conditions, which commonly include counseling, drug testing, educational courses, community service, or restitution, the charges are dismissed. If they fail, the prosecution resumes. Federal pretrial diversion operates under the Justice Manual, which gives U.S. Attorneys discretion to divert and encourages prioritizing young offenders, people with substance abuse or mental health challenges, and veterans, while excluding certain serious categories such as firearm offenses, offenses causing serious bodily injury or death, child exploitation, public trust violations, and national security crimes absent high-level approval.6U.S. Department of Justice. Justice Manual 9-22.000 – Pretrial Diversion Program Whether to offer diversion at all is itself a discretionary choice, and some offices use it heavily while others rarely do.
What Shapes a Prosecutor’s Choices
Prosecutors do not make these calls in a vacuum. Several factors feed in.
Evidence comes first. Prosecutors evaluate whether what they have is both sufficient and admissible. A strong story built on a key piece of evidence seized through an illegal search may not be worth filing. The seriousness of the offense matters as well, with violent crimes and public safety threats almost always jumping ahead of property crimes or low-level drug cases.
A defendant’s criminal history enters the calculation because prior convictions can unlock higher statutory penalties and weaken arguments for leniency. Victim input also factors in, especially in cases involving interpersonal violence, where many offices consult the victim before deciding how to charge or settle.
Then there is the factor nobody likes to discuss: resources. Every office has a finite budget, limited staff, and more cases than it can realistically try. That scarcity forces triage. Low-priority cases get declined or resolved quickly so attention can go to cases the office treats as more important. Office-wide priorities feed into this, so a prosecutor’s office focused on gun violence will allocate differently than one focused on fraud.
The Legal Limits
Prosecutorial discretion is broad, but it is not unlimited.
Required Evidence Disclosure
The most important working limit is the Brady rule. The Supreme Court held in 1963 that suppressing evidence favorable to the defendant violates due process when that evidence is material to guilt or punishment, regardless of whether the prosecutor acted in good or bad faith.7Justia Law. Brady v. Maryland, 373 U.S. 83 (1963) The duty is broad. It covers any information favorable to the defense that could reduce a potential sentence, undermine a prosecution witness’s credibility, or lead a jury to doubt the defendant’s guilt. Prosecutors must disclose this material whether or not the defense requests it.8Legal Information Institute. Brady Rule
The rule reaches impeachment evidence about prosecution witnesses, including pending criminal cases against them, benefits they have received from the government, or prior inconsistent statements. Prosecutors are responsible not only for what they personally know but also for information in law enforcement files that reasonable diligence would uncover. When a violation surfaces after conviction, the defendant must show a “reasonable probability” the outcome would have been different had the evidence been disclosed, a standard met when the suppression “undermines confidence in the outcome of the trial.”8Legal Information Institute. Brady Rule A proven Brady violation can lead to a conviction being overturned.
Equal Protection
Prosecutors cannot base decisions on race, religion, or other arbitrary classifications. A prosecution motivated by the defendant’s exercise of constitutional rights, such as political speech, can also be challenged as vindictive or selective. In practice, winning a selective prosecution claim is extraordinarily difficult. Courts begin with a “presumption of regularity” that prosecutors have properly carried out their duties, and to overcome it the defendant must present “clear evidence” of both discriminatory effect and discriminatory purpose, typically by showing that similarly situated people of a different classification were not prosecuted.9Legal Information Institute. United States v. Armstrong, 517 U.S. 456 (1996) Getting discovery to make that showing is itself a steep climb.
The Grand Jury
In the federal system and in many states, prosecutors cannot bring serious felony charges on their own. They must present the case to a grand jury, which decides whether probable cause exists to believe a person committed an offense. The grand jury can indict or return a “no-bill,” declining to charge. The Justice Manual describes the grand jury as serving both to investigate crime and to protect citizens from unfounded charges.10U.S. Department of Justice. Justice Manual 9-11.000 – Grand Jury In practice, the prosecutor controls what evidence the grand jury sees, and indictment rates are very high. The grand jury remains the only institutional checkpoint between the decision to charge and the formal accusation that begins a criminal case.
Why Accountability Is Thin
When prosecutors make bad decisions or engage in misconduct, holding them personally liable is nearly impossible. The Supreme Court held in 1976 that prosecutors are absolutely immune from civil lawsuits for actions taken while initiating and presenting criminal cases.11Justia Law. Imbler v. Pachtman, 424 U.S. 409 (1976) A defendant who was wrongfully prosecuted generally cannot sue the prosecutor for money damages, even if the prosecution violated constitutional rights. The Court has also held that a district attorney’s office cannot be held liable for a single Brady violation under a failure-to-train theory; the plaintiff would need to prove a pattern.12Justia Law. Connick v. Thompson, 563 U.S. 51 (2011)
Other checks exist but are weaker. State bar associations can discipline prosecutors for ethical violations such as dishonesty or withholding evidence, though in practice bar discipline against prosecutors is rare. Internal office policies on charging, plea offers, and diversion eligibility promote consistency even though defendants cannot enforce them. Elected prosecutors face political accountability at the ballot box. Courts can intervene in narrow situations, dismissing charges for vindictive prosecution or reversing convictions tainted by misconduct, but judicial review of the core decision to charge or not charge remains very limited. That choice has consistently been treated as belonging to the executive branch.9Legal Information Institute. United States v. Armstrong, 517 U.S. 456 (1996)