A criminal case in the United States moves through a defined sequence: charges are filed, the accused appears before a judge, both sides prepare during a pre-trial phase where most cases actually resolve, a trial is held if no plea is reached, a sentence is imposed after conviction, and the defendant may appeal. Understanding how criminal court works means understanding what happens at each of those stages, what rights attach, and which deadlines control. Federal and state systems differ in detail, but the overall structure is the same.
How Charges Get Filed
A criminal case starts one of two ways: a grand jury indictment or a document called an information filed directly by the prosecutor. The Fifth Amendment requires that serious federal crimes be charged by grand jury indictment.1Constitution Annotated. U.S. Constitution – Fifth Amendment About half the states also require grand jury indictments for felonies; the rest allow prosecutors to file charges directly after a preliminary hearing.
A grand jury is a group of citizens who review the prosecutor’s evidence to decide whether there is probable cause to believe a crime was committed and that a specific person committed it. It does not decide guilt. It typically hears only the government’s evidence and does not hear from the defense.2United States District Court Middle District of Florida. Handbook for Federal Grand Jurors If the grand jury finds probable cause, it returns an indictment, which is the formal written statement of charges.
A defendant can waive the right to a grand jury and agree to be charged by information. This often happens when someone has already negotiated a plea deal and wants to move the case forward rather than wait for a grand jury to convene.3Legal Information Institute. Federal Rules of Criminal Procedure Rule 7 – The Indictment and the Information
Your First Appearance in Court
After an arrest, you are brought before a judge for an initial appearance. In federal court this typically happens the same day or the day after arrest.4United States Department of Justice. Initial Hearing / Arraignment If you were arrested without a warrant, the Supreme Court has held that a judge must make a probable cause determination within 48 hours. A delay beyond that point is presumptively unreasonable.5Justia U.S. Supreme Court. County of Riverside v. McLaughlin, 500 U.S. 44 (1991)
At the hearing, the judge explains the charges and advises you of your constitutional rights. If the case has already been indicted, the initial appearance and arraignment happen together, and you enter a plea. That plea is typically not guilty at this early stage.6Federal Public Defender Central District of California. Arrest and Arraignment
Getting an Attorney
The Sixth Amendment guarantees the right to a lawyer in any criminal prosecution.7Constitution Annotated. U.S. Constitution – Sixth Amendment If you cannot afford one, the court will appoint a public defender or a private attorney at government expense. You fill out a financial affidavit listing income, assets, and expenses. The standard is not total poverty; the court looks at whether the cost of hiring private counsel, combined with your living expenses and the cost of bail, exceeds what you can realistically afford. Doubts are resolved in your favor.
Bail and Pretrial Release
The judge also decides whether you will be released while the case is pending. The law starts from a presumption of release unless the government proves you pose a danger to the community or are likely to flee.8United States Courts. Pretrial Release and Detention in the Federal Judiciary Conditions can be as simple as a promise to appear, or can include electronic monitoring, curfews, or cash bail. For the most serious charges, the judge can order you held without bail if no conditions would adequately protect the public.
What Happens Before Trial
The period between arraignment and trial is where most of the legal work happens and where the overwhelming majority of criminal cases end. Both sides investigate, exchange evidence, argue over what should be allowed at trial, and often negotiate a resolution.
The Speedy Trial Clock
Federal law sets strict time limits. Under the Speedy Trial Act, an indictment must be filed within 30 days of arrest, and the trial must begin within 70 days after the indictment is filed or the defendant’s first court appearance, whichever comes later.9Office of the Law Revision Counsel. 18 USC 3161 – Time Limits for Disposition The trial also cannot start sooner than 30 days after the defendant first appears with an attorney, so the defense has time to prepare. Many delays are excludable: time spent on pre-trial motions, mental health evaluations, or continuances that both sides agree to does not count against the clock. State courts have their own speedy trial rules, and the timelines vary.
Discovery and Brady Material
Discovery is the process through which the prosecution shares its evidence with the defense. Under Federal Rule of Criminal Procedure 16, the government must allow the defense to inspect documents, physical evidence, test results, and any statements the defendant made to law enforcement.10Legal Information Institute. Federal Rules of Criminal Procedure Rule 16 – Discovery and Inspection The prosecution has a continuing obligation to turn over relevant materials as they become available.11United States Department of Justice. Steps in the Federal Criminal Process – Discovery
On top of that procedural rule sits a constitutional one. The Supreme Court held in Brady v. Maryland that the prosecution must disclose any evidence favorable to the defendant that is material to guilt or punishment. Suppressing that evidence violates due process regardless of whether the prosecutor acted in good faith.12Justia U.S. Supreme Court. Brady v. Maryland, 373 U.S. 83 (1963) A Brady violation discovered after conviction can result in a new trial.
Pre-Trial Motions
Either side can file motions asking the judge to resolve legal issues before trial. These motions shape what the jury sees and sometimes determine whether the case reaches trial at all.13Legal Information Institute. Federal Rules of Criminal Procedure Rule 12 – Pleadings and Pretrial Motions
- A motion to suppress argues that evidence was obtained in violation of your constitutional rights and should be excluded from trial. If police searched your home without a valid warrant, a successful motion could keep everything they found out of the jury’s hands.
- A motion to dismiss argues that a legal defect prevents the case from proceeding, such as a flawed indictment, a speedy trial violation, or a statute that does not cover the alleged conduct.
- A motion in limine asks the judge to rule in advance on whether specific evidence or testimony will be allowed, so the jury never hears prejudicial material.
Plea Bargaining
Most criminal cases resolve through plea bargaining rather than trial. The defendant agrees to plead guilty, typically to a reduced charge or in exchange for the prosecutor recommending a lighter sentence.14United States Department of Justice. Plea Bargaining A plea agreement is not final until a judge approves it. The judge will question you directly to confirm you understand what you are giving up, including your right to a trial, your right to confront witnesses, and your right against self-incrimination. The judge also confirms that no one coerced you. If the judge accepts the plea, the case moves directly to sentencing.
The Trial
If no plea deal is reached, the case goes to trial. Most criminal trials are jury trials, but a defendant can waive the jury and have the judge decide the case alone in a bench trial. You have a constitutional right to a jury trial for any offense carrying a potential sentence of six months or longer.15Office of the Law Revision Counsel. 18 U.S. Code 3559 – Sentencing Classification of Offenses
Jury Selection
A jury trial begins with jury selection, known as voir dire. A pool of prospective jurors is brought in, and the judge and attorneys question them to identify bias or conflicts of interest.16United States Courts. Juror Selection Process Attorneys can remove jurors in two ways. A challenge for cause argues that a specific juror cannot be fair; the judge rules on it, and there is no limit on how many a side can raise. A peremptory challenge lets an attorney remove a juror without stating a reason, but each side gets only a limited number. In federal felony cases, the defense gets 10 peremptory challenges and the government gets 6.17Legal Information Institute. Federal Rules of Criminal Procedure Rule 24 – Trial Jurors Under Batson v. Kentucky, peremptory strikes cannot be used to exclude jurors based on race.18Justia U.S. Supreme Court. Batson v. Kentucky, 476 U.S. 79 (1986)
Opening Statements and the Prosecution’s Case
Once the jury is seated, both sides deliver opening statements. The prosecutor goes first because the government carries the burden of proof, outlining what the evidence will show. The defense then previews its theory of the case.19United States Department of Justice. Trial
The prosecution presents its case-in-chief, calling witnesses and introducing physical evidence. After each witness is questioned on direct examination, the defense cross-examines, probing for inconsistencies, challenging the witness’s memory or credibility, and drawing out facts that help the defense.
The Defense’s Case and Closing Arguments
After the prosecution rests, the defense can present its own witnesses and evidence but has no obligation to do so. The Fifth Amendment protects the defendant’s right not to testify, and the prosecution cannot comment on a decision to remain silent.1Constitution Annotated. U.S. Constitution – Fifth Amendment In many cases the defense strategy is simply to show that the prosecution has not met its burden. Once the evidence is in, both sides deliver closing arguments.
Instructions, Deliberation, and Verdict
The judge then instructs the jury on the law, including the most important rule in criminal court: the prosecution must prove guilt beyond a reasonable doubt. That is the highest standard of proof in the legal system, and the jury cannot convict if a genuine, well-founded uncertainty about guilt remains based on the evidence.
The jury deliberates in private until it reaches a verdict. In all federal and state criminal trials, the verdict must be unanimous. Every juror must agree on guilt or acquittal.20Constitution Annotated. Amdt6.4.4.3 Unanimity of the Jury If the jury cannot agree, the judge declares a mistrial, and the prosecution must decide whether to retry the case. An acquittal is final. The Double Jeopardy Clause prevents the government from trying you again for the same offense.
Sentencing
After a guilty verdict or plea, the case moves to sentencing. In federal court, a probation officer prepares a presentence investigation report covering the defendant’s criminal history, personal background, and the details of the offense.21Office of the Law Revision Counsel. 18 U.S. Code 3552 – Presentence Reports The report includes advisory sentencing guideline calculations that give the judge a recommended range, and it heavily influences the sentence the judge imposes.22United States Courts. Presentence Investigations
Federal law gives crime victims the right to be reasonably heard at sentencing.23GovInfo. 18 USC 3771 – Crime Victims Rights Victim impact statements describe how the crime affected the victim’s life, finances, and emotional well-being. Both the prosecutor and defense attorney also present arguments before the judge makes the final decision.
Sentences can include incarceration, probation, fines, community service, or a combination. For many federal crimes involving identifiable victims, restitution is mandatory. The defendant must pay back the victim’s actual financial losses, including medical expenses, lost income, and the value of stolen or damaged property.24United States Department of Justice. The Restitution Process for Victims of Federal Crimes Defendants are often also responsible for court costs, supervision fees, and special assessments.
Appeals
A conviction is not necessarily the end. A defendant found guilty at trial can appeal to a higher court, arguing that legal errors during the proceedings affected the outcome.25United States Department of Justice. Appeal In federal court, the notice of appeal must be filed within 14 days after the judgment is entered. Miss that deadline and you generally lose the right to appeal.26Legal Information Institute. Federal Rules of Appellate Procedure Rule 4 – Appeal as of Right, When Taken
An appeal is not a second trial. The appellate court does not hear new witnesses or consider new evidence. It reviews the written record from the trial court to determine whether a significant legal mistake occurred. Common grounds include improper jury instructions, the wrongful admission or exclusion of evidence, and errors in applying sentencing guidelines.
If the appellate court finds a prejudicial error, it can reverse the conviction, order a new trial, or modify the sentence. In some cases a reversal leads to dismissal of the charges entirely if the government cannot retry the case. A defendant who loses at the circuit court level can petition the U.S. Supreme Court to hear the case, though the Court accepts only a small fraction of these requests.