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Criminal Law

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Criminal defense law is the practice of representing people and organizations accused of crimes. It spans the full range of offenses, from minor infractions to serious felonies, and the full course of a case — from investigation and arrest through charging, pretrial proceedings, trial, sentencing, and appeal.

A defining principle is the presumption of innocence: an accused person is treated as innocent unless and until the government proves guilt beyond a reasonable doubt, the highest standard in law. Defendants generally have important protections, which can include the right to remain silent, the right to a lawyer, the right to be informed of the charges, the right to challenge the government's evidence and witnesses, and protections against unreasonable searches and improperly obtained evidence.

The work of criminal defense includes advising a client, examining the strength and lawfulness of the government's evidence, identifying possible defenses, negotiating with prosecutors, and, when a case goes to trial, presenting a defense. Many cases are resolved through negotiated agreements rather than trials, but how to proceed is a significant decision that belongs to the accused.

For a non-lawyer, the key point is that the consequences of a criminal case can reach a person's liberty, finances, record, employment, and more. Anyone who is questioned by police, arrested, charged, or under investigation generally benefits from consulting a defense lawyer as early as possible.

From the OpenJurist Bookshop

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Sub-practice areas

More specific practice areas within Criminal Law — narrower topics that fall under it, each with its own page.

Key definitions

Defined terms that recur in criminal law — each links to its dictionary entry.

Criminal Negligence

Landmark cases (54)

showing 24 of 54

Landmark cases are the Supreme Court decisions that defined or reshaped Criminal Law — establishing the controlling principles courts still apply. Current law leads; where a decision overruled an earlier landmark, the superseded case is shown beneath it.

Key cases of the U.S. Courts of Appeals

The most-cited decisions applying this area's U.S. Code — beyond the landmark cases above.

Frequently asked questions

Criminal Law by state

Courts, law libraries and state-specific resources. State law governs much of this area, so deadlines and rules vary by state.

Further reading

  • Forensic Medicolegal Injury and Death Investigation - Paperback
    Forensic Medicolegal Injury and Death Investigation - Paperback
    M. D. Dudley
  • Data-Driven Law: Data Analytics and the New Legal Services - Paperback
    Data-Driven Law: Data Analytics and the New Legal Services - Paperback
  • Post-Execution Punishment: Attitudes, Legislative Initiatives and Policies - Hardcover
    Post-Execution Punishment: Attitudes, Legislative Initiatives and Policies - Hardcover
  • The Price of Justice in America: Commentaries on the Criminal Justice System and Ways to Fix What's Wrong - Hardcover
    The Price of Justice in America: Commentaries on the Criminal Justice System and Ways to Fix What's Wrong - Hardcover
    Paul Brakke
  • Long Way Home: A Young Man Lost in the System and the Two Women Who Found Him - Paperback
    Long Way Home: A Young Man Lost in the System and the Two Women Who Found Him - Paperback
    Laura Caldwell
  • The Revised Codes Of Montana Of 1907 V2, Part 4: Penal Code (1908) - Paperback
    The Revised Codes Of Montana Of 1907 V2, Part 4: Penal Code (1908) - Paperback
    E. C. Day
  • Brutal Takeover: The story behind the seizure of the global Stanford Financial Group and criminal prosecution of billionaire R. Allen Stanford - Paperback
    Brutal Takeover: The story behind the seizure of the global Stanford Financial Group and criminal prosecution of billionaire R. Allen Stanford - Paperback
    Robert H. Brame
  • Dsk: The Scandal That Brought Down Dominique Strauss-Kahn - Hardcover
    Dsk: The Scandal That Brought Down Dominique Strauss-Kahn - Hardcover
    John Solomon
  • Building Sexual Misconduct Cases Against Powerful Men - Paperback
    Building Sexual Misconduct Cases Against Powerful Men - Paperback
  • Criminalising Hate: Law as Social Justice Liberalism - Hardcover
    Criminalising Hate: Law as Social Justice Liberalism - Hardcover
    Mark Austin Walters
  • Children of the State: Stories of Survival and Hope in the Juvenile Justice System - Paperback
    Children of the State: Stories of Survival and Hope in the Juvenile Justice System - Paperback
    Jeff Hobbs
  • State Crime: Current Perspectives - Paperback
    State Crime: Current Perspectives - Paperback
  • Revise SQE Criminal Law 2025-26 - Paperback
    Revise SQE Criminal Law 2025-26 - Paperback
    Mark Thomas
  • The Trial of the Assassin Guiteau: Psychiatry and the Law in the Gilded Age - Paperback
    The Trial of the Assassin Guiteau: Psychiatry and the Law in the Gilded Age - Paperback
    Charles E. Rosenberg
  • Tackling Torture: Prevention in Practice - Paperback
    Tackling Torture: Prevention in Practice - Paperback
    Malcolm D. Evans
  • The Idaho Four Tragedy: Four College Students, One Deadly Night, and the Path to Justice - Paperback
    The Idaho Four Tragedy: Four College Students, One Deadly Night, and the Path to Justice - Paperback
    Evelyn L. Wells
  • Introduction to Policing and Police Powers - Paperback
    Introduction to Policing and Police Powers - Paperback
    Leonard Jason-Lloyd
  • Crimes, Harms, and Wrongs: On the Principles of Criminalisation - Paperback
    Crimes, Harms, and Wrongs: On the Principles of Criminalisation - Paperback
    A. P. Simester
  • Restoring Justice: An Introduction to Restorative Justice - Paperback
    Restoring Justice: An Introduction to Restorative Justice - Paperback
    Daniel W. Van Ness
  • Terrorism: Commentary on Security Documents Volume 116: Assessing President Obama's National Security Strategy - Hardcover
    Terrorism: Commentary on Security Documents Volume 116: Assessing President Obama's National Security Strategy - Hardcover
    Douglas Lovelace
  • Black Silent Majority: The Rockefeller Drug Laws and the Politics of Punishment - Hardcover
    Black Silent Majority: The Rockefeller Drug Laws and the Politics of Punishment - Hardcover
    Michael Javen Fortner
  • The Crime of Aggression: The Quest for Justice in an Age of Drones, Cyberattacks, Insurgents, and Autocrats - Paperback
    The Crime of Aggression: The Quest for Justice in an Age of Drones, Cyberattacks, Insurgents, and Autocrats - Paperback
    Noah Weisbord
  • Till Death Us Do Part: A True Murder Mystery - Paperback
    Till Death Us Do Part: A True Murder Mystery - Paperback
    Vincent Bugliosi
  • The New Philosophy of Criminal Law - Paperback
    The New Philosophy of Criminal Law - Paperback

This overview is general legal information, not legal advice, and does not create an attorney–client relationship. Laws vary by state and change over time — consult a licensed attorney about your situation.