Other meanings of United States criminal procedure
Law
United States criminal procedure is the body of law governing the process of criminal trials and appeals in US courts, from investigation and arrest through post-conviction review. It is shaped by constitutional guarantees, statutory rules, and judicial precedent, balancing governmental power with individual rights. The procedure is adversarial, with the prosecution and defense presenting competing cases before a neutral judge or jury. Key protections include the Fourth Amendment's warrant requirement, the Fifth Amendment's privilege against self-incrimination, and the Sixth Amendment's right to counsel and trial by jury. These rules apply across federal and state systems, though states may provide additional protections under their own constitutions.
The core of United States criminal procedure lies in the Bill of Rights, which the Supreme Court has applied to the states through the Fourteenth Amendment's Due Process Clause, a process known as incorporation. The Fourth Amendment protects against unreasonable searches and seizures, requiring warrants based on probable cause. The Fifth Amendment guarantees grand jury indictment for federal crimes, prohibits double jeopardy, and protects against compelled self-incrimination. The Sixth Amendment secures the right to a speedy and public trial, an impartial jury, and the assistance of counsel. The Eighth Amendment bars excessive bail and cruel and unusual punishment. These provisions are enforced through the exclusionary rule, which bars evidence obtained in violation of these rights, as established in Mapp v. Ohio (1961).1
A criminal case typically begins with an investigation, which may involve searches, surveillance, and interrogation. After arrest, the defendant is brought before a magistrate for an initial appearance, where charges are read and bail is set. A preliminary hearing or grand jury determines whether probable cause exists to proceed. Arraignment follows, where the defendant enters a plea. Pretrial motions address issues such as suppression of evidence or change of venue. Trial proceeds with jury selection, opening statements, witness testimony, and closing arguments. The prosecution must prove guilt beyond a reasonable doubt. If convicted, sentencing occurs, followed by the right to appeal. Post-conviction remedies, such as habeas corpus, allow challenges to unlawful detention.
Landmark decisions have shaped the procedure's contours. Miranda v. Arizona (1966) required that suspects be informed of their rights to remain silent and to counsel before custodial interrogation. Gideon v. Wainwright (1963) established the right to appointed counsel for indigent defendants in felony cases. Terry v. Ohio (1968) permitted brief investigatory stops based on reasonable suspicion. United States v. Nixon (1974) limited executive privilege in criminal proceedings. More recently, United States v. Jones (2012) held that attaching a GPS tracker to a vehicle constitutes a search under the Fourth Amendment. These cases illustrate the dynamic balance between law enforcement needs and individual liberties.2
Beyond the familiar rules, several niche dimensions merit attention. The federal system employs a unique "speedy trial" statute, the Speedy Trial Act of 1974, which imposes strict time limits between arrest and trial, unlike state systems that rely on constitutional standards. The writ of coram nobis is a rare post-conviction remedy used when no other avenue exists, often in immigration-related cases. The "plain view" doctrine allows warrantless seizure of evidence inadvertently discovered by police. The "inevitable discovery" exception permits admission of evidence that would have been found legally anyway. Additionally, the military justice system operates under the Uniform Code of Military Justice, which diverges from civilian procedure in several respects, including the absence of a grand jury.
This article focuses on the procedural rules applicable in federal and state criminal courts in the United States.
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