Criminal procedure is the adjudication process of the criminal law. While criminal procedure differs dramatically by jurisdiction, the process generally begins with a formal criminal charge with the person on trial either being free on bail or incarcerated, and results in the conviction or acquittal of the defendant. Criminal procedure can be either in the form of inquisitorial or adversarial criminal procedure.

Basic rights.

Currently, in many countries with a democratic system and the rule of law, criminal procedure puts the burden of proof on the prosecution – that is, it is up to the prosecution to prove that the defendant is guilty beyond any reasonable doubt, as opposed to having the defense prove that they are innocent, and any doubt is resolved in favor of the defendant. This provision, known as the presumption of innocence, is required, for example, in the 46 countries that are members of the Council of Europe, under Article 6 of the European Convention on Human Rights, and it is included in other human rights documents. However, in practice it operates somewhat differently in different countries. Such basic rights also include the right for the defendant to know what offense he or she has been arrested for or is being charged with, and the right to appear before a judicial official within a certain time of being arrested. Many jurisdictions also allow the defendant the right to legal counsel and provide any defendant who cannot afford their own lawyer with a lawyer paid for at the public expense.

A fair trial is a trial which is "conducted fairly, justly, and with procedural regularity by an impartial judge". Various rights associated with a fair trial are explicitly proclaimed in Article 10 of the Universal Declaration of Human Rights, the Sixth Amendment to the United States Constitution, and Article 6 of the European Convention of Human Rights, as well as numerous other constitutions and declarations throughout the world. There is no binding international law that defines what is not a fair trial; for example, the right to a jury trial and other important procedures vary from nation to nation.

Fair trial rights.

The right to a fair trial has been defined in numerous regional and international human rights instruments. It is one of the most extensive human rights and all international human rights instruments enshrine it in more than one article. The right to a fair trial is one of the most litigated human rights and substantial case law that has been established on the interpretation of this human right. Despite variations in wording and placement of the various fair trial rights, international human rights instruments define the right to a fair trial in broadly the same terms. The aim of the right is to ensure the proper administration of justice. As a minimum the right to fair trial includes the following fair trial rights in civil and criminal proceedings:

the right to be heard by a competent, independent and impartial tribunal,

the right to a public hearing,

the right to be heard within a reasonable time,

the right to counsel, and,

the right to interpretation.

States may limit the right to a fair trial or derogate from the fair trial rights only under circumstances specified in the human rights instruments.