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Key Facts
- Federal level: A federal crime is conduct that Congress has prohibited under a constitutional source of federal power.
- Federal level: Congress cannot create a general national criminal code for every local offense; a federal statute ordinarily connects the prohibited conduct to an enumerated federal power.
- Federal and state: Federal district courts have jurisdiction over federal offenses, and 18 U.S.C. § 3231 expressly preserves state-court jurisdiction under state law.
- Federal level: Federal investigators gather evidence, but federal prosecutors decide whether to bring a criminal case on behalf of the United States.
- Federal level: A federal felony is normally charged by indictment unless the defendant waives indictment and prosecution proceeds by information.
A federal crime is not simply a particularly serious crime or one that receives national attention. It is an offense defined by federal law and connected to authority the Constitution gives the national government. That distinction separates federal crimes from the much larger body of offenses created and prosecuted under state law.
What makes conduct a federal crime?
Congress may attach criminal penalties to laws enacted under its enumerated powers. The Commerce Clause, for example, supports federal criminal statutes with the required connection to interstate or foreign commerce.
Federal criminal authority has constitutional limits. Congress’s Constitution Annotated explains that Congress cannot punish felonies generally and that most federal offenses contain a jurisdictional element tying the prohibited conduct to a constitutional power. A jurisdictional element is a fact the government must establish that supplies the federal connection, such as movement across state lines, use of an interstate facility, or an effect on interstate commerce.
The required connection depends on the specific statute. A federal charge therefore cannot be evaluated from the everyday name of the conduct alone; the statute’s elements define both what is prohibited and what makes the matter federal.
Federal and state crimes can overlap
Federal and state criminal jurisdiction are separate. Title 18 gives U.S. district courts original jurisdiction over offenses against the laws of the United States, while expressly preserving state-court jurisdiction under state law.
A local investigation does not become a federal case merely because federal criminal laws exist. Federal agencies do, however, work with state, local, tribal, and international partners, and some investigations operate through joint task forces.
The site’s archive also provides historical context on the expansion and proposed reform of federal criminal laws. That reform history is narrower than this article’s foundational question: “federal crime” describes conduct Congress has prohibited, while a charge is the formal accusation that a person violated a particular statute.
Who investigates and who charges?
The FBI’s stated programs include terrorism, cybercrime, public corruption, civil-rights violations, organized crime, white-collar crime, violent crime, and other national investigative priorities.
An investigation and a prosecution are different stages. FBI personnel use intelligence, science, technology, and other tools to investigate federal crimes and terrorism. The government initiates a federal criminal case, usually through a federal prosecutor working with a law-enforcement agency.
Investigation does not itself establish guilt.
How a federal criminal case moves into court
When an arrest occurs, Federal Rule of Criminal Procedure 5 generally requires the person to be taken without unnecessary delay before a magistrate judge or an authorized state or local judicial officer. At the initial appearance, the court explains the complaint and important rights and addresses matters such as counsel and pretrial release or detention.
For a federal felony, Rule 7 ordinarily requires an indictment unless indictment is waived. An indictment is the grand jury’s formal accusation and must contain a plain, concise, and definite statement of the essential facts constituting the charged offense. A misdemeanor may proceed by indictment, information, or complaint.
At arraignment, the court states the substance of the charge and asks the defendant to enter a plea. If the court accepts a guilty plea, there is no trial on guilt; after a not-guilty plea, the case may proceed toward trial.
If the case reaches trial, the government bears the burden of proving guilt beyond a reasonable doubt. If the defendant is found not guilty, the defendant is released and the government may not appeal that verdict.
Why the exact statute matters
“Federal crime” is a broad classification, not a complete description of an accusation. The charging document identifies the statute, the counts, and the essential factual allegations.
Labels can conceal important differences, so the elements of the cited statute matter more than the category name.
A federal sentence may include imprisonment, a fine, or restitution, but the existence and range of each consequence cannot be inferred merely from the phrase “federal crime.”
A practical way to read the term
When an official document uses the phrase, the most informative questions are legal rather than dramatic: Which federal statute is involved, what jurisdictional fact connects the conduct to federal power, which agency investigated, and has a complaint, information, or indictment actually been filed? Those distinctions show whether the document describes suspected conduct, a formal accusation, a guilty plea, a verdict, or a sentence.
State law remains a separate layer. A federal dismissal, prosecution, or judgment does not by itself describe what state law provides, and a state charge does not automatically establish a federal offense. Each sovereign’s statute, charging decision, and court record must be read on its own terms.
Sources
- Constitution Annotated: Criminal Law and the Commerce Clause
- 18 U.S.C. § 3231: Federal district-court criminal jurisdiction
- United States Courts: Criminal Cases
- Federal Bureau of Investigation: What We Investigate
- Federal Rule of Criminal Procedure 5: Initial Appearance
- Federal Rule of Criminal Procedure 7: Indictment and Information
- Federal Rule of Criminal Procedure 10: Arraignment
- Federal Rule of Criminal Procedure 11: Pleas
