A crime becomes a federal offense when it connects to one of the powers the Constitution grants the national government. What makes something a federal crime, in practice, is one of five triggers: the act happened on federal property, it crossed state or international borders, it targeted the federal government or its employees, it violated a statute only Congress can enforce, or it used a federal system like the mail, the wires, or the banking network. Most criminal law is state law, and state courts handle the vast majority of prosecutions. Federal jurisdiction attaches only when one of those hooks is present.
Crimes Committed on Federal Property
The simplest trigger is location. When a crime occurs on land the federal government owns or controls, federal law applies. Under 18 U.S.C. § 7, the “special maritime and territorial jurisdiction” of the United States covers any land reserved or acquired for federal use where the government holds exclusive or concurrent authority.1Office of the Law Revision Counsel. 18 USC 7 – Special Maritime and Territorial Jurisdiction of the United States Defined That includes military bases, VA hospitals, federal courthouses, and national parks. A fistfight inside a national park or a shoplifting incident at a commissary on a naval base lands in federal court rather than state court.
The same statute extends federal reach to the high seas, vessels belonging to U.S. citizens or corporations outside any state’s waters, and U.S. diplomatic compounds abroad.1Office of the Law Revision Counsel. 18 USC 7 – Special Maritime and Territorial Jurisdiction of the United States Defined An assault causing serious bodily injury on federal land carries up to ten years in prison under 18 U.S.C. § 113.2Office of the Law Revision Counsel. 18 USC 113 – Assaults Within Maritime and Territorial Jurisdiction
The Assimilative Crimes Act
Not every offense has a dedicated federal statute. If someone commits an act on federal land that Congress never specifically criminalized, the Assimilative Crimes Act (18 U.S.C. § 13) borrows the criminal law of the surrounding state. The federal court treats the offense as though the state law applied and imposes the same punishment the state would.3Office of the Law Revision Counsel. 18 U.S. Code 13 – Laws of States Adopted for Areas Within Federal Jurisdiction Virtually no criminal conduct goes unpunished just because it happened on a federal reservation and Congress didn’t anticipate it.
Criminal Activity Crossing State or National Borders
The Commerce Clause in Article I, Section 8 gives Congress power to regulate activity affecting interstate or foreign commerce, and it is the broadest foundation for federal criminal law.4Cornell Law School. Criminal Law and the Commerce Clause Once a criminal scheme moves people, drugs, weapons, or money across state lines, it moves out of any single state’s reach and into federal territory.
Drug trafficking is the most common example. The Controlled Substances Act classifies drugs into five schedules, and distributing a controlled substance is a federal crime regardless of what any state’s law says about that drug.5Office of the Law Revision Counsel. 21 U.S. Code 812 – Schedules of Controlled Substances Even in states that have legalized marijuana, federal law still technically applies. Federal authorities often decline to pursue state-legal activity, but multi-state trafficking networks are where that discretion disappears. Mandatory minimums for drug trafficking run from five to twenty years depending on the substance, quantity, and criminal history.6FAMM. Federal Mandatory Minimums
Human trafficking follows a similar pattern. Federal trafficking statutes carry a minimum of ten years, with life imprisonment possible when the offense involves children or results in death.7EveryCRSReport.com. Human Trafficking – Key Federal Criminal Statutes The Mann Act specifically targets transporting individuals across state lines for sexual exploitation.8LII / Legal Information Institute. Mann Act
Kidnapping becomes a federal crime under 18 U.S.C. § 1201, sometimes called the Lindbergh Law, whenever the victim is transported across state or national borders. A ransom demand is not required. The statute covers anyone seized and held “for ransom or reward or otherwise” as long as interstate transportation or another federal hook is present.9Office of the Law Revision Counsel. 18 U.S. Code 1201 – Kidnapping Federal jurisdiction also applies when the victim is a federal employee or a foreign official.10United States Department of Justice Archives. 1034 Kidnapping – Federal Jurisdiction Penalties reach any term of years up to life, and the death penalty is available if the victim dies.
Federal Firearm Offenses
Federal gun laws draw heavily on the commerce power. Under 18 U.S.C. § 922, it is a federal crime for a convicted felon, a fugitive, or certain other disqualified individuals to possess a firearm that has moved through interstate commerce at any point in its existence.11Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Because virtually every manufactured firearm crosses a state line before reaching its buyer, this provision reaches remarkably far. The same statute makes it a federal crime to traffic firearms across state lines without a license, transport stolen firearms in interstate commerce, or possess a weapon with an obliterated serial number.
Crimes Targeting the Federal Government or Its Employees
A separate category of federal crimes exists to protect the people who run the government and the property they use. Under 18 U.S.C. § 111, assaulting or forcibly interfering with a federal officer or employee during their official duties is a federal offense. Simple assault carries up to one year. If the assault involves physical contact or intent to commit a felony, the maximum jumps to eight years. Use a dangerous weapon or inflict bodily injury, and the ceiling becomes twenty years.12Office of the Law Revision Counsel. 18 USC 111 – Assaulting, Resisting, or Impeding Certain Officers or Employees The general federal fine statute allows fines up to $250,000 for any felony conviction.13Office of the Law Revision Counsel. 18 U.S. Code 3571 – Sentence of Fine
Stealing government property triggers federal charges based on what was taken, not where the theft happened. Under 18 U.S.C. § 641, theft of government property worth more than $1,000 is punishable by up to ten years. Below that threshold, the offense is a misdemeanor carrying up to one year.14Office of the Law Revision Counsel. 18 USC 641 – Public Money, Property or Records
Threats against the President, Vice President, and their successors carry up to five years under 18 U.S.C. § 871. The threat does not need to be realistic or specific; knowingly and willfully making a threat to harm the President in any form, whether by letter, social media post, or spoken words, is enough.15Office of the Law Revision Counsel. 18 U.S. Code 871 – Threats Against President and Successors to the Presidency
Violations of Federal Statutes Only Congress Can Enforce
Some areas of law belong exclusively to the federal government because they involve policies that only work with uniform national rules. These crimes do not require crossing state lines or happening on federal land. The subject matter itself is what triggers jurisdiction.
Tax evasion is the clearest example. Under 26 U.S.C. § 7201, willfully attempting to evade or defeat any federal tax is a felony carrying up to five years.16Office of the Law Revision Counsel. 26 USC 7201 – Attempt to Evade or Defeat Tax Immigration offenses like illegal reentry and human smuggling are governed by the Immigration and Nationality Act and prosecuted exclusively in federal court.17Office of the Law Revision Counsel. 8 USC 1227 – Deportable Aliens
Civil rights violations are another area where federal authority steps in. Under 18 U.S.C. § 242, anyone acting under color of law who willfully deprives a person of their constitutional rights faces federal prosecution. The base penalty is one year, but if the violation causes bodily injury the maximum rises to ten years. If the victim dies, the sentence can reach life or even death.18Office of the Law Revision Counsel. 18 USC 242 – Deprivation of Rights Under Color of Law This is the statute federal prosecutors use against police officers and other public officials, and it often comes into play when state prosecutors decline to bring charges or secure only lenient sentences.
Crimes Using Federal Systems or Infrastructure
Using a specific national system to carry out a crime can turn what would otherwise be a local fraud into a federal case. Mail and wire fraud are the broadest examples.
Mail fraud under 18 U.S.C. § 1341 applies whenever someone uses the U.S. Postal Service or a private interstate carrier to advance a scheme to defraud. A single mailing in furtherance of the scheme is enough.19Office of the Law Revision Counsel. 18 USC 1341 – Frauds and Swindles Wire fraud under 18 U.S.C. § 1343 covers transmissions by wire, radio, or television in interstate or foreign commerce, which in practice means any phone call, email, text message, or internet transaction that crosses state lines. Both statutes carry a maximum of twenty years per count. When the fraud targets a financial institution or involves a presidentially declared disaster, the maximum jumps to thirty years and $1 million in fines.20Office of the Law Revision Counsel. 18 U.S. Code 1343 – Fraud by Wire, Radio, or Television
Crimes against federally insured banks also fall here. Bank robbery under 18 U.S.C. § 2113 carries up to twenty years for a robbery by force or intimidation, and up to twenty-five years when a dangerous weapon is involved.21Office of the Law Revision Counsel. 18 USC 2113 – Bank Robbery and Incidental Crimes Even smaller thefts from a covered bank, credit union, or savings and loan are federal misdemeanors carrying up to one year. Fraud against federal healthcare programs like Medicare and Medicaid is prosecuted federally under separate statutes.22eCFR. 42 CFR Part 1007 – State Medicaid Fraud Control Units
Computer Fraud
The Computer Fraud and Abuse Act (18 U.S.C. § 1030) makes it a federal crime to access a “protected computer” without authorization or to exceed authorized access. The statute defines “protected computer” to include any computer used in or affecting interstate or foreign commerce or communication.23Office of the Law Revision Counsel. 18 U.S. Code 1030 – Fraud and Related Activity in Connection With Computers Since any internet-connected device arguably affects interstate commerce, the statute reaches almost every computer in the country. Accessing a computer to obtain national security information carries up to ten years on a first offense and twenty on a second. Intentionally causing damage through malware can bring up to ten years on a first offense. Computer-based extortion and fraud each carry up to five years.
Being Prosecuted in Both State and Federal Court
One of the more surprising aspects of federal criminal law is that the same conduct can be prosecuted in both state and federal court without violating the Double Jeopardy Clause. The Supreme Court confirmed this in Gamble v. United States (2019), holding that state and federal governments are separate sovereigns with separate laws. Violating both a state statute and a federal statute for the same act constitutes two different offenses.24Legal Information Institute. Dual Sovereignty Doctrine
Dual prosecution for the same act is uncommon in practice. The Department of Justice’s internal Petite Policy generally prohibits federal prosecutors from pursuing a case state courts have already handled unless three conditions are met: the matter involves a substantial federal interest, the prior prosecution left that interest “demonstrably unvindicated,” and the evidence is likely sufficient to sustain a federal conviction. Approval from the relevant Assistant Attorney General is also required.25United States Department of Justice. Authority of the U.S. Attorney in Criminal Division Matters – Prior Approvals The most visible exceptions tend to be civil rights cases where a state acquittal or lenient sentence prompts federal prosecutors to step in under statutes like 18 U.S.C. § 242.
Why the Federal Label Matters
The practical weight of a federal case comes from two features of the system. First, serious federal charges must be returned by a grand jury under the Fifth Amendment, and the trial happens in a U.S. District Court rather than a state court.26LII / Legal Information Institute. Fifth Amendment27United States Department of Justice. Introduction to the Federal Court System
Second, there is no parole in the federal system for offenses committed after November 1, 1987. The Comprehensive Crime Control Act of 1984 abolished federal parole and replaced it with supervised release that begins after the prison sentence ends.28Justice.gov (U.S. Department of Justice). History of the Federal Parole System Federal inmates can earn up to 54 days of good-conduct credit per year of the sentence imposed, but there is no release board deciding whether someone has been rehabilitated enough.29Federal Register. Good Conduct Time Credit Under the First Step Act A federal ten-year sentence means roughly eight and a half years behind bars, not four or five as might happen in some state systems. That distinction is why the question of whether a crime is federal or state carries so much weight.