Criminal Law
Crimes, penalties, and criminal procedure
Overview
Criminal law encompasses the body of law that defines conduct prohibited by the government because it threatens public safety and welfare. Federal criminal law is primarily codified in Title 18 of the United States Code, covering offenses ranging from fraud and cybercrime to drug trafficking and terrorism. State criminal codes cover the vast majority of crimes prosecuted in the United States, including murder, assault, theft, and DUI.
The U.S. criminal justice system is built on constitutional protections including the right to counsel, the presumption of innocence, protection against unreasonable searches, and the prohibition of cruel and unusual punishment. The Fourth, Fifth, Sixth, and Eighth Amendments form the backbone of criminal procedure.
Sentencing in federal courts is guided by the U.S. Sentencing Guidelines, which provide recommended ranges based on offense severity and criminal history. Following United States v. Booker (2005), these guidelines are advisory rather than mandatory, giving judges discretion to impose sentences outside the recommended range.
Key Federal Laws
- •18 U.S.C. — Crimes and Criminal Procedure
- •Controlled Substances Act (21 U.S.C. § 801 et seq.)
- •Racketeer Influenced and Corrupt Organizations Act (RICO)
- •Federal Sentencing Guidelines
- •Computer Fraud and Abuse Act (18 U.S.C. § 1030)
Key Cases
- •Miranda v. Arizona (1966) — Right to remain silent
- •Gideon v. Wainwright (1963) — Right to counsel
- •Mapp v. Ohio (1961) — Exclusionary rule
- •United States v. Booker (2005) — Advisory sentencing guidelines
- •Batson v. Kentucky (1986) — Jury selection discrimination
State Variations
Criminal law varies dramatically by state. States define their own criminal offenses, set penalties, and establish procedures. Some states have abolished the death penalty while others retain it. Drug possession penalties range from decriminalization to felony charges. Three-strikes laws, mandatory minimums, and sentencing enhancements differ substantially across jurisdictions.
Frequently Asked Questions
What is the difference between a felony and a misdemeanor?
A felony is a crime punishable by more than one year in prison, while a misdemeanor carries a maximum of one year or less. Felonies include murder, robbery, and drug trafficking. Misdemeanors include petty theft, simple assault, and minor drug possession. Felony convictions carry long-term consequences including loss of voting rights in some states.
What are my rights if I am arrested?
Upon arrest, you have the right to remain silent (Fifth Amendment), the right to an attorney (Sixth Amendment), and the right to be informed of these rights (Miranda warning). You have the right to a speedy trial, to confront witnesses, and to not be subjected to excessive bail. If you cannot afford an attorney, one will be appointed for you.
What is the statute of limitations for federal crimes?
Most federal crimes have a five-year statute of limitations under 18 U.S.C. § 3282. However, there is no statute of limitations for murder or certain terrorism offenses. Tax crimes have a six-year limit, and some fraud offenses have extended limitations periods. The clock typically starts when the crime is committed, not when it is discovered.
Related Laws & Statutes
Unlawful Carrying Weapons – Permitless Carry (HB 1927)
Texas allows anyone 21 or older to carry a handgun, openly or concealed, without a permit — as long as they are not prohibited from possessing firearms by law (e.g., felons, domestic violence offenders).
NY SAFE Act – Firearms Regulations
New York bans assault weapons and high-capacity magazines (more than 10 rounds). The law requires background checks for all gun sales, including private sales, and mandates mental health reporting.
Marijuana Regulation and Taxation Act (MRTA)
Adults 21+ in New York can legally possess up to 3 ounces of cannabis flower or 24 grams of concentrate. Home cultivation of up to 6 plants is allowed. Licensed retail dispensaries can sell cannabis products.
Home Protection; Use or Threatened Use of Deadly Force (Stand Your Ground)
In Florida, you have no legal obligation to retreat before using force, including deadly force, if you reasonably believe it's necessary to prevent death, serious injury, or a forcible felony. This applies in your home, vehicle, or any place you have a right to be.
SAFE-T Act – Pretrial Fairness Act (Cash Bail Elimination)
Illinois eliminated cash bail. Instead of paying money to get out of jail before trial, judges now decide whether to detain or release defendants based on the risk they pose to public safety and their likelihood of appearing in court.
Cannabis Regulation and Tax Act
Illinois residents 21+ can legally possess up to 30 grams of cannabis flower, 5 grams of concentrate, or 500mg of THC in edibles. Non-residents visiting Illinois can possess half those amounts.
Related Cases
Miranda v. Arizona
384 U.S. 436 (1966)
The Court held that the Fifth Amendment's protection against self-incrimination requires law enforcement to advise suspects of their rights before custodial interrogation. These rights include the right to remain silent, that anything said can be used against them in court, the right to an attorney, and that if they cannot afford an attorney, one will be appointed.
Compare Criminal Law Across States
See how different states handle criminal law side by side.
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