Criminal Procedure Steps

What is criminal procedure? The basic picture

Criminal law says what counts as a crime. Criminal procedure is the rulebook for how the government investigates, charges, tries, and punishes someone. In the U.S., much of that rulebook comes straight from the Bill of Rights: the Fourth Amendment (searches and seizures), the Fifth (grand jury, self-incrimination, double jeopardy, due process), the Sixth (speedy and public jury trial, counsel, confrontation), and the Eighth (no excessive bail or cruel and unusual punishment).

Through the 14th Amendment, most of these protections apply to the states too. That's why a shoplifting case in Ohio and a fraud case in federal court in New York share the same constitutional skeleton, even though the details differ.

Step 1: Investigation and arrest

Police can arrest with a warrant, or without one if they have probable cause to believe the person committed a crime. Searches generally need a warrant too, though there are many exceptions. If police break the rules, the exclusionary rule can keep the evidence out of court; Mapp v. Ohio, 367 U.S. 643 (1961), applied that rule to the states.

Once a suspect is in custody and police want to question them, the familiar warnings come in. Those come from Miranda v. Arizona (1966): the right to remain silent and to have a lawyer present.

TV makes arrests look like the climax. In real life the arrest is closer to page one. Almost everything that decides the outcome happens in the quiet steps that come after it.

Step 2: First appearance and bail

After booking, the person must be brought before a judge quickly. For people arrested without a warrant, County of Riverside v. McLaughlin, 500 U.S. 44 (1991), says a judicial probable-cause determination within 48 hours is generally prompt enough.

At this first appearance the judge explains the charges, addresses counsel, and decides on release. Options include release on a promise to return, conditions like check-ins, money bail, or detention. The Eighth Amendment bans excessive bail, but United States v. Salerno, 481 U.S. 739 (1987), upheld federal pretrial detention of people found dangerous after a hearing.

1. Arrest and booking: fingerprints, photos, record of charges.
2. First appearance: charges read, counsel addressed, release decided.
3. Charging: grand jury indictment or prosecutor's information plus preliminary hearing.
4. Arraignment: formal charges, plea of guilty, not guilty, or no contest.
5. Pretrial: discovery, motions, plea negotiations.
6. Trial or plea, then sentencing and appeal.

Step 3: Charging, grand juries, and arraignment

The Fifth Amendment requires a grand jury indictment for serious federal crimes. A grand jury is a group of citizens who hear the prosecutor's evidence in secret and decide whether there's enough to charge. The Supreme Court held in Hurtado v. California, 110 U.S. 516 (1884), that this requirement doesn't bind the states, so many states use a prosecutor's "information" followed by a preliminary hearing before a judge instead.

At arraignment, the defendant hears the formal charges and enters a plea. Then comes pretrial work: the defense gets discovery, files motions (for example, to suppress evidence), and talks with the prosecutor. Under Brady v. Maryland, 373 U.S. 83 (1963), prosecutors must disclose evidence favorable to the accused that is material to guilt or punishment.

Step 4: Plea bargaining, where most cases end

Here's the part most people don't expect. The large majority of convictions come from guilty pleas. In Missouri v. Frye (2012), the Supreme Court noted that 97 percent of federal convictions and 94 percent of state convictions were the result of guilty pleas, and said plain out that the criminal justice system today is "for the most part a system of pleas, not a system of trials."

A plea deal usually trades a guilty plea for a lesser charge or a lighter recommended sentence. Courts accept it only if the plea is knowing and voluntary. Santobello v. New York, 404 U.S. 257 (1971), held that when a prosecutor breaks a plea promise, the defendant is entitled to a remedy.

Step 5: Trial, sentencing, and appeal

If the case goes to trial, the Sixth Amendment guarantees a speedy and public trial by an impartial jury for serious crimes (Duncan v. Louisiana, 391 U.S. 145 (1968)). Since Ramos v. Louisiana (2020), a guilty verdict for a serious offense must be unanimous in state courts too. The prosecution must prove every element beyond a reasonable doubt (In re Winship, 397 U.S. 358 (1970)), and the defendant can cross-examine the witnesses against them.

After a conviction, a judge usually sets the sentence, guided in federal court by the Sentencing Guidelines. The defendant can appeal legal errors; the prosecution generally can't appeal an acquittal because of the double jeopardy clause.

The Constitution also sets a timing check. Barker v. Wingo, 407 U.S. 514 (1972), weighs four factors for speedy trial claims: length of delay, reason, whether the defendant asserted the right, and prejudice. Read with due process, it's a good example of balancing tests in constitutional law.

A jury trial is rare, but it shapes everything else. Prosecutors and defense lawyers negotiate in the shadow of what twelve strangers might decide. The right to a trial matters even in the cases that never have one.

U.S. vs. Korean criminal procedure

Korea's system is built on the Criminal Procedure Act (형사소송법) and Article 12 of the Constitution. Prosecutors traditionally hold the power to indict, and there is no grand jury. After an arrest, a detention warrant must be requested within 48 hours or the suspect released (Article 200-2(5) for arrests on a warrant; Article 200-4 sets a similar limit for emergency arrests made without one). Since 2008, Korea has citizen participatory trials (국민참여재판), where a jury gives a verdict that is advisory, not binding.

For the Korean steps from complaint to sentence, see the related product Criminal Case Procedure in Everyday Law: From Complaint and Arrest to Indictment, Non-Prosecution and Execution of Sentence in Korea, and for a civil vs. criminal comparison, Civil and Criminal Trial Procedure in Korea: Preparatory Proceedings, Criminal Trials, Summary Proceedings and Mock Trial Opinions.

Common mistakes and study tips

• Mixing up indictment and conviction. An indictment is a charge, not a finding of guilt.
• Forgetting the states. Most criminal cases are state cases, and grand juries aren't required there.
• Thinking Miranda covers every conversation. It applies to custodial interrogation.
• Study tip: make a table with each step, the right attached to it, and the leading case. It doubles as an exam outline.

What are the main steps of a criminal case?

Arrest, first appearance and bail, charging (grand jury or preliminary hearing), arraignment, pretrial motions and plea talks, trial or plea, sentencing, and appeal.

Do most criminal cases go to trial?

No. The Supreme Court noted in Missouri v. Frye (2012) that about 97% of federal and 94% of state convictions come from guilty pleas.

Is a grand jury required in every state?

No. The Fifth Amendment grand jury requirement applies to federal felonies; Hurtado v. California (1884) held it doesn't bind the states.

Is this legal advice?

No. It's general information; anyone facing charges should talk to a criminal defense lawyer or public defender.

References and official sources

1. Federal Rules of Criminal Procedure. Cornell LII
2. Criminal procedure overview, Wex. Cornell LII
3. Steps in the federal criminal process. U.S. Department of Justice
4. Missouri v. Frye, 566 U.S. 134 (2012). Justia
5. 형사소송법. 국가법령정보센터
6. Gideon v. Wainwright, 372 U.S. 335 (1963); County of Riverside v. McLaughlin, 500 U.S. 44 (1991); Ramos v. Louisiana, 590 U.S. 83 (2020).