The Meaning of the Concept
The presumption of innocence is a legal principle holding that a person accused of a crime must be considered innocent until their guilt has been established by a final court judgment. This principle defines the starting point of criminal proceedings: a person under investigation or prosecution must not be treated as guilty — by the state or by society — unless a court has conclusively proven otherwise. The presumption of innocence is regarded as a safeguard that must be respected not only in the courtroom but also in press statements, administrative actions, and statements made by public officials.
Constitutional and Legal Basis
In Turkish law, the presumption of innocence is explicitly set out in the fourth paragraph of Article 38 of the 1982 Constitution: "No one shall be considered guilty until proven guilty by a court verdict." This provision appears in the constitutional section titled "Principles Relating to Offenses and Penalties," and according to the Constitutional Court's settled case law, it is a core fundamental right that cannot be restricted even in times of war, mobilization, or a state of emergency. The principle "in dubio pro reo" — that doubt benefits the defendant — together with the rule that the burden of proof lies with the prosecution, found in the Code of Criminal Procedure, are concrete reflections of the presumption of innocence in criminal proceedings: the obligation to prove a charge rests not with the defendant but with the prosecution, and any doubt in the evidence must be interpreted in the defendant's favor. This rule is considered one of the most fundamental operating principles of criminal procedure, preventing a defendant from being forced to prove their own innocence.
Origins in International Law
One of the principle's roots in modern law lies in Article 9 of the French Declaration of the Rights of Man and of the Citizen of 1789, which states that every person must be presumed innocent until declared guilty. The same principle is also found in Article 11 of the 1948 Universal Declaration of Human Rights. Within the European human rights system, the presumption of innocence is guaranteed under the second paragraph of Article 6 of the European Convention on Human Rights, which governs the right to a fair trial. The European Court of Human Rights' settled case law interprets this article not merely as a procedural rule governing the trial process but as broad protection that also prohibits public authorities from later referring to a person as guilty after an acquittal or the discontinuation of proceedings against them. This broad interpretation shows that the presumption of innocence is a right that continues to have effect, to some extent, even after proceedings have concluded.
Concrete Reflections in Practice
The best-known consequence of the presumption of innocence concerns the burden of proof: it is not the accused who must prove their innocence, but the prosecution that must prove guilt beyond reasonable doubt. Beyond this, the principle also requires that protective measures such as pre-trial detention be applied only exceptionally and proportionately, that a person not be publicly declared guilty while proceedings are still ongoing, and that law enforcement and judicial officials use neutral language in their statements. In Turkish legal doctrine, this is often discussed under the concept of the "right not to be stigmatized," which points to a dimension of the presumption of innocence that also protects a person's social reputation. The mere fact that an investigation has been opened against a person does not mean that person is guilty; for this reason, it is particularly important not to conflate the terms "suspect" and "convict" in official documents and public statements.
The Relationship Between the Presumption of Innocence and the Right Not to Be Stigmatized
Frequently discussed in Turkish legal doctrine as an extension of the presumption of innocence, the right not to be stigmatized means that a person must not be branded as guilty in society or in official records unless a final conviction has been issued against them. This right becomes especially important after investigations that end in acquittal or a decision that there are no grounds for prosecution: even though the legal accusation against the person has been formally dropped, the impression left by the process in the public eye is often not so easily erased. For this reason, the Constitutional Court's individual application decisions emphasize that the language used by public authorities in press statements and official correspondence must not directly portray a person as guilty in a process that has not yet been concluded.
Historical Development
The roots of the presumption of innocence extend back to principles of Roman law that placed the burden of proof on the accuser; however, the principle's development into an individual right in its modern sense dates to a much more recent period — the Enlightenment. Under the inquisitorial procedures common in medieval Europe, a suspect was often required to disprove their own guilt, and torture could be used to extract a confession. Eighteenth-century Enlightenment thinkers — most notably the Italian jurist Cesare Beccaria in his 1764 work "On Crimes and Punishments" — sharply criticized this practice, arguing that a person could only be considered guilty following a final court judgment. This school of thought was soon codified in the 1789 French Declaration and, from there, passed down into the international human rights instruments of the 20th century.
Comparison Across Legal Systems
The concrete operation of the presumption of innocence can vary somewhat depending on the legal system. In Anglo-Saxon (common law) systems, the principle takes concrete form in the rule that a jury may not convict a defendant unless persuaded "beyond reasonable doubt," keeping the standard of proof high. In the Continental European legal tradition, the same principle is expressed as requiring that the judge's inner conviction leave no room for doubt; Turkish criminal procedure law follows this tradition as well. Despite procedural differences between systems, the common thread remains unchanged: until a conviction is handed down, the burden of proof always rests with the prosecution, and the defendant is never expected to prove their own innocence.
Situations Falling Outside the Scope of the Presumption
Because the presumption of innocence is a safeguard directly tied to criminal proceedings, its scope is discussed differently in certain administrative and disciplinary processes. For example, in non-criminal matters such as administrative traffic fines or professional disciplinary investigations, the principle applies differently than in criminal proceedings; however, the case law of the European Court of Human Rights holds that a sanction being formally classified as "administrative" is not, on its own, sufficient to exclude it from the presumption of innocence — criteria such as the severity and purpose of the sanction must also be taken into account. This approach shows that the concept of "criminal law" must be assessed by a functional standard rather than a purely formal classification.
Limits and Current Debates
Although the presumption of innocence is an absolute right, its application can give rise to contentious areas in practice. For example, media coverage of an ongoing investigation file can create a public "perception of guilt" about a person who has not yet been convicted — a situation that directly conflicts with the purpose of the principle. Similarly, prolonged pre-trial detention — even though it is not legally a punishment — draws criticism for creating the practical impression of punishment. When reviewing such applications, the Constitutional Court and the European Court of Human Rights carefully examine whether the language used by public authorities in official statements portrays a person as guilty, directly or indirectly. This body of case law shows that the presumption of innocence is used not merely as an abstract principle but as a functional standard for reviewing concrete judicial practices.