Criminal Law

I

Introduction

Criminal Law, branch of law that defines crimes, establishes punishments, and regulates the investigation and prosecution of people accused of committing crimes. Criminal law includes both substantive law, which is addressed in this article, and criminal procedure, which regulates the implementation and enforcement of substantive criminal law.

Substantive criminal law defines crime and punishment—for example, what act constitutes murder or what punishment a murderer should receive. On the other hand, criminal procedure is concerned with the legal rules followed and the steps taken to investigate, apprehend, charge, prosecute, convict, and sentence to punishment individuals who violate substantive criminal law. For example, criminal procedure describes how a murder trial must be conducted.

This article discusses criminal law in the context of the common law system, which is found in countries such as England, Canada, and the United States. In the common law system, judges decide cases by referring to principles set forth in previous judicial decisions. Common law systems are typically contrasted with civil law systems, which are found in most Western European countries, much of Latin America and Africa, and parts of Asia. In civil law systems, judges decide cases by referring to statutes, which are enacted by legislatures and compiled in comprehensive books called codes.

In legal systems based on common law, criminal law is distinguished from what is known as civil law. In this context, the term civil law refers to the rules regulating private relationships, such as marriage, contracts, and personal injuries. In contrast, criminal law governs actions and relationships that are deemed to harm society as a whole.

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II

Purpose of Criminal Law

Criminal law seeks to protect the public from harm by inflicting punishment upon those who have already done harm and by threatening with punishment those who are tempted to do harm. The harm that criminal law aims to prevent varies. It may be physical harm, death, or bodily injury to human beings; the loss of or damage to property; sexual immorality; danger to the government; disturbance of the public peace and order; or injury to the public health. Conduct that threatens to cause, but has not yet caused, a harmful result may be enough to constitute a crime. Thus, criminal law often strives to avoid harm by forbidding conduct that may lead to harmful results.

One purpose of both civil law and criminal law in the common law system is to respond to harmful acts committed by individuals. However, each type of law provides different responses. A person who is injured by the action of another may bring a civil lawsuit against the person who caused the harm. If the victim prevails, the civil law generally provides that the person who caused the injury must pay money damages to compensate for the harm suffered. A person who acts in a way that is considered harmful to society in general may be prosecuted by the government in a criminal case. If the individual is convicted (found guilty) of the crime, he or she will be punished under criminal law by either a fine, imprisonment, or death. In some cases, a person’s wrongful and harmful act can invoke both criminal and civil law responses.

III

Theories of Criminal Punishment

Various theories have been advanced to justify or explain the goals of criminal punishment, including retribution, deterrence, restraint (or incapacitation), rehabilitation, and restoration. Sometimes punishment advances more than one of these goals. At other times, a punishment may promote one goal and conflict with another.

A

Retribution

The theory of retribution holds that punishment is imposed on the blameworthy party in order for society to vent its anger toward and exact vengeance upon the criminal. Supporters of this theory look upon punishment not as a tool to deter future crime but as a device for ensuring that offenders pay for past misconduct.

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