A prosecutor is the government’s lawyer in criminal cases. They decide whether to charge someone with a crime, present the evidence against the accused in court, and recommend a sentence if there’s a conviction. Unlike a defense attorney, who represents one client, a prosecutor represents the public, and that difference shapes everything about the job.
What Makes a Prosecutor Different From Other Lawyers
Every lawyer has a client. A prosecutor’s client is the government, and through the government, the public at large. That changes the goal. A private attorney tries to win for their client. A prosecutor is supposed to pursue justice, which sometimes means not winning.
The Supreme Court spelled this out in Berger v. United States. A prosecutor, the Court wrote, “is the representative not of an ordinary party to a controversy, but of a sovereignty whose obligation to govern impartially is as compelling as its obligation to govern at all.” A prosecutor may strike hard blows, “he is not at liberty to strike foul ones.” The government’s interest, the Court said, “is not that it shall win a case, but that justice shall be done.”1Justia U.S. Supreme Court Center. Berger v. United States
One concrete consequence of that duty is the Brady rule. Under Brady v. Maryland, prosecutors must turn over evidence that favors the defendant. The Court held that “the suppression by the prosecution of evidence favorable to an accused upon request violates due process where the evidence is material either to guilt or to punishment, irrespective of the good faith or bad faith of the prosecution.”2Justia U.S. Supreme Court Center. Brady v. Maryland A witness who recanted, a lab test that points the other way, a prior inconsistent statement — if it helps the defense, the prosecutor has to disclose it.
The American Bar Association’s Model Rule 3.8 adds more. Prosecutors must avoid bringing charges they know lack probable cause, must make timely disclosure of evidence that tends to negate guilt or reduce a sentence, and must avoid public statements that would heighten condemnation of the accused. If a prosecutor later discovers credible evidence that a convicted person may be innocent, the rule requires prompt disclosure to the court and the defendant.3American Bar Association. Rule 3.8 – Special Responsibilities of a Prosecutor
What a Prosecutor Actually Does
A criminal case begins with a charging decision, not an arrest. Police can investigate and arrest, but the prosecutor decides whether formal charges get filed. That gatekeeping role is one of the most consequential powers in the justice system, because a case that is never charged never reaches a courtroom.
Prosecutors review police reports, forensic evidence, and witness statements to decide if there’s enough to move forward. The legal threshold is probable cause: a reasonable basis to believe a particular person committed the crime. Experienced prosecutors look past that minimum and ask whether the evidence is strong enough to prove the case beyond a reasonable doubt at trial. If it isn’t, filing wastes resources and harms the accused. A lot of weak cases quietly end here.
When charges go forward, the form depends on the jurisdiction and the seriousness of the offense. In the federal system, the Fifth Amendment requires that felony prosecutions begin with an indictment returned by a grand jury, which reviews the prosecutor’s evidence and decides whether probable cause exists.4United States Department of Justice. Justice Manual – 9-11.000 – Grand Jury Less serious federal charges, or cases where the defendant waives the grand jury, can proceed through an information filed by the prosecutor and reviewed by a judge. State practice varies. Some states rely heavily on grand juries; others let prosecutors file most charges directly through an information or complaint.
From there, the prosecutor runs the case. They negotiate with defense counsel, prepare witnesses, argue pretrial motions, present evidence at trial, and cross-examine defense witnesses. If the defendant is convicted, the prosecutor files a sentencing memorandum recommending a specific punishment, may present victim impact evidence, and argues against defense claims that minimize the offense. The judge makes the sentencing call, but the prosecution’s recommendation carries real weight, especially under sentencing guidelines.
The Power of Prosecutorial Discretion
Within an active case, the prosecutor holds broad authority over how it moves. No legislature can write rules detailed enough to cover every scenario, so prosecutors fill the gap with judgment calls. That authority goes by a single name: prosecutorial discretion.
Its most visible form is plea bargaining. Roughly 90 to 95 percent of criminal cases at both the federal and state level are resolved through negotiated pleas rather than trials.5Bureau of Justice Assistance. Plea and Charge Bargaining Research Summary A defendant might plead guilty to a lesser charge or to fewer counts in exchange for a lighter recommended sentence. Without plea bargaining, the court system would stall. There aren’t enough judges, courtrooms, or public defenders to try every case.
Prosecutors can also grant immunity to witnesses. Federal law lets a U.S. Attorney ask a court to compel testimony despite a witness’s Fifth Amendment privilege, with the compelled testimony walled off from future use against that witness. The request requires approval from the Attorney General or a designated senior DOJ official.6Office of the Law Revision Counsel. 18 USC 6003 – Court and Grand Jury Proceedings This is often the only way to build cases against higher-level targets when lower-level participants won’t talk.
At the other end, a prosecutor can move to dismiss. Federal Rule of Criminal Procedure 48(a) allows the government to dismiss an indictment, information, or complaint with the court’s permission, though not during trial without the defendant’s consent.7Legal Information Institute. Rule 48 – Dismissal A key witness becomes unavailable, new evidence undermines the case, or the social cost of continuing outweighs the benefit. The ability to walk away gives the system flexibility that rigid rules can’t.
State Prosecutors vs. Federal Prosecutors
Most criminal prosecutions in the United States happen at the state level. The chief local prosecutor is usually called a District Attorney, State’s Attorney, or County Attorney, depending on the state. These offices cover a single county or judicial circuit and handle everything from shoplifting to homicide. A chief prosecutor leads the office, with assistant prosecutors handling daily courtroom work.
Most local prosecutors are elected, typically to four-year terms. That makes them directly accountable to voters, in theory. In practice, many local prosecutor races are uncontested, and incumbents often run unopposed for multiple terms.
The federal system operates through United States Attorneys spread across 94 judicial districts.8United States Courts. About U.S. District Courts Federal law requires each U.S. Attorney to “prosecute for all offenses against the United States” within their district.9Office of the Law Revision Counsel. 28 USC 547 – Duties The President appoints each U.S. Attorney, and the Senate confirms.10Office of the Law Revision Counsel. 28 USC 541 – United States Attorneys They serve at the pleasure of the President, so a new administration can and routinely does replace them. Career assistant U.S. attorneys below them stay on and provide continuity.
Which court a case lands in depends on which laws were allegedly broken. Federal cases tend to involve crimes that cross state lines, violate federal statutes, or occur on federal property: drug trafficking networks, large-scale fraud, public corruption, civil rights violations. The deciding factor is always jurisdiction.
Special Counsel and State Attorneys General
Some cases create conflicts of interest that ordinary prosecutors can’t handle. When a criminal investigation would require the Department of Justice to investigate its own leadership or close political allies, the Attorney General can appoint a Special Counsel. Under federal regulations, a Special Counsel is appointed when a criminal investigation is warranted and prosecution by regular DOJ attorneys “would present a conflict of interest for the Department or other extraordinary circumstances.”11eCFR. General Powers of Special Counsel The Special Counsel must come from outside the federal government.12eCFR. 28 CFR 600.1 – Grounds for Appointing a Special Counsel
State attorneys general occupy a different position. The attorney general is the state’s chief legal officer but does not routinely handle local criminal cases. Authority over local prosecutors varies by state. Some attorneys general can initiate or take over local prosecutions on their own; others can only step in when a local district attorney asks or when a specific statute grants authority over a particular category of crime. A few states give the attorney general no power to intervene at all.
Victims and the Prosecutor
A prosecutor represents the public, not the victim. That distinction surprises people, especially victims who assume the prosecutor is their lawyer. The prosecutor makes the strategic calls on charges, plea offers, and trial decisions, and a victim can disagree with any of them.
Federal law gives crime victims specific rights the prosecutor must respect. The Crime Victims’ Rights Act guarantees the right to be reasonably heard at proceedings involving release, plea, and sentencing, the right to confer with the government’s attorney, the right to timely notice of court proceedings and plea agreements, and the right to be treated with fairness and respect for the victim’s dignity.13Office of the Law Revision Counsel. 18 USC 3771 – Crime Victims Rights Most federal prosecutor offices employ victim-witness coordinators who notify victims about case developments, explain court proceedings, provide information about restitution, and connect victims with counseling and compensation services.14United States Department of Justice. Victim and Witness Services State offices generally run similar programs.
When Prosecutors Cross the Line
Given the power the job carries, misconduct does happen. The accountability picture is narrower than most people expect.
In Imbler v. Pachtman, the Supreme Court held that prosecutors are absolutely immune from civil lawsuits for actions taken “within the scope of [their] duties in initiating and pursuing a criminal prosecution and in presenting the State’s case.”15Justia U.S. Supreme Court Center. Imbler v. Pachtman Someone who was wrongly prosecuted generally cannot sue the prosecutor for damages, even when the prosecutor acted improperly. The Court reasoned that without this shield, fear of lawsuits would discourage aggressive enforcement. The immunity covers advocacy functions like charging and presenting evidence. When prosecutors act as investigators or administrators, they get a weaker qualified immunity instead.
That leaves professional discipline as the main accountability mechanism. Prosecutors are licensed attorneys and are subject to state bar rules like any other lawyer. A prosecutor who suppresses evidence, lies to a court, or otherwise violates ethical rules can face sanctions from a private reprimand up to suspension or disbarment. Whether bar authorities pursue these cases aggressively is a separate question, and critics argue that discipline is rare relative to the documented rate of misconduct.