The presumption of innocence in Turkish criminal law is not a decorative principle or a slogan used only in academic writing. It is one of the structural rules that shape the entire criminal process in Türkiye, from the opening of the investigation to the wording of public statements, the treatment of defendants in court, the allocation of the burden of proof, the lawfulness of detention, and the effect of an acquittal. Turkish law treats it as both a constitutional guarantee and a practical procedural rule. A person is not legally guilty because suspicion exists, because an investigation is pending, because an indictment has been filed, or even because a first-instance court has used accusatory language before the judgment has lawfully established guilt. The criminal process is supposed to move in the opposite direction: guilt must be proven according to law, and until then innocence remains the legal baseline. (Anayasa Mahkemesi)
The constitutional text is direct. Article 38 of the Constitution of the Republic of Türkiye states that “No one shall be considered guilty until proven guilty in a court of law.” The same article also protects the privilege against self-incrimination and states that findings obtained through illegal methods shall not be considered evidence. Article 36 separately guarantees the right to a fair trial through legitimate means and procedures. Read together, these provisions show that the presumption of innocence in Turkish criminal law is not isolated from the rest of criminal procedure. It works alongside the right to silence, the right to defense, and the lawful-evidence rule. That combination matters because a system that presumes innocence must also prevent the State from proving guilt through coerced self-incrimination or unlawful evidence. (Anayasa Mahkemesi)
Turkish Constitutional Court case-law has made the same point in more doctrinal language. The Court has stated that the presumption of innocence is an element inherent in the right to a fair trial safeguarded by Article 36 and is also expressly protected by Article 38 § 4 of the Constitution. The Court has further explained that the guarantee has two aspects. The first concerns the period before the criminal proceedings end and forbids premature declarations of guilt. The second concerns the period after an acquittal or a comparable non-conviction outcome and requires public authorities and later proceedings to respect the legal meaning of that result. This two-layer understanding is especially important in Turkish practice because innocence is not only a trial-stage protection. It also shapes what may be said before conviction and how a person must be treated after acquittal. (Kararlar Bilgi Bankası)
One of the clearest practical consequences of the presumption of innocence is the allocation of the burden of proof. The Constitutional Court has stated explicitly that innocence is the essential starting point, that the burden of proving guilt lies with the claimant, and that no one may be placed under a duty to prove his or her own innocence. This is a foundational idea in Turkish criminal law. A suspect or defendant may stay silent, may deny the accusation, may present evidence in defense, or may challenge the prosecution’s evidence, but none of those choices changes the basic rule that the prosecution must prove guilt. The accused is not legally required to produce innocence in order to avoid conviction. This is one of the core reasons the presumption of innocence remains indispensable in a modern criminal justice system. (Kararlar Bilgi Bankası)
That burden-of-proof rule also explains why the presumption of innocence is closely tied to the evidentiary structure of Turkish criminal procedure. The Code of Criminal Procedure provides that a court may base its decision only on evidence brought before the hearing and discussed there, and that the charged offense may be proven only through lawfully obtained evidence. It also requires the court to reject unlawfully obtained evidence when its production is requested and to explain in the reasoning of a conviction which evidence was accepted and rejected, including material obtained by unlawful methods. These rules matter because the presumption of innocence is not preserved merely by repeating that phrase in judgments. It is preserved when the State is forced to prove guilt with lawful evidence in a fair hearing rather than with assumptions, shortcuts, or illegally gathered material. (Mevzuat)
The presumption of innocence also shapes the meaning of suspicion. Turkish criminal procedure allows the authorities to investigate when they learn of facts creating the impression that a crime may have been committed, and it allows indictment when the evidence creates sufficient suspicion. But neither threshold is the same as guilt. Suspicion justifies investigation, and sufficient suspicion may justify opening a public case, but the constitutional presumption of innocence remains in force until guilt is proven in court according to law. This distinction is critical in practice because many people loosely equate being investigated or charged with having effectively been found guilty. Turkish constitutional law rejects that approach. The existence of a criminal charge changes procedural status, but it does not remove the constitutional presumption of innocence. (Kararlar Bilgi Bankası)
A related and very important issue is public language. The Constitutional Court has stated that the presumption of innocence protects individuals from being declared guilty by public authorities until guilt is legally established. At the same time, the Court has also recognized that freedom of expression and the public’s right to receive information mean that authorities are not absolutely barred from informing the public about an ongoing criminal investigation. The line is therefore not between total silence and unrestricted official commentary. The real boundary is whether the language used informs the public about the investigation or instead implies that the person has already committed the offense. That distinction matters greatly in Turkish criminal law because statements by authorities, public institutions, or courts outside the final judgment can violate the presumption of innocence if they present suspicion as if it were established guilt. (Kararlar Bilgi Bankası)
This same principle extends beyond criminal trial courts. The Constitutional Court has explained that the first aspect of the presumption of innocence is not limited to the trial judge. Administrative and judicial authorities generally must also refrain from language implying guilt before conviction. The Court has further noted that the presumption may be violated not only in criminal proceedings themselves but also in parallel administrative, civil, or disciplinary contexts if those proceedings or official statements undermine the person’s innocence before criminal guilt has been established. This is an especially important feature of Turkish law because it shows that the presumption of innocence has horizontal procedural consequences across the legal system, not merely inside the criminal courtroom. (Kararlar Bilgi Bankası)
The second aspect of the presumption of innocence is just as significant. The Constitutional Court has held that where a person has been acquitted, or where it could not be established that the person definitely committed the offense, the presumption continues to protect that person. It has also stated that in subsequent non-criminal proceedings, especially where the same factual event is being discussed, authorities must act consistently with the acquittal and must not undermine it by effectively reasserting guilt. In other words, the presumption of innocence in Turkish criminal law does not end merely because the criminal file has closed. If the closure took the form of acquittal or a comparable outcome showing that guilt was not established, later authorities must respect that legal result. This post-acquittal protection is a crucial part of the doctrine and is often overlooked in everyday legal practice. (Kararlar Bilgi Bankası)
Another major area where the presumption of innocence matters is pre-trial detention. Turkish law allows detention only under strict conditions, including concrete indications showing strong suspicion and a lawful detention ground, and it requires consideration of less restrictive alternatives such as judicial control. The Constitutional Court has emphasized that, despite the presumption of innocence guaranteed by Article 38 § 4, continued detention can be justified only where it is shown with evidence that the interests of the proper administration of justice outweigh the person’s right to liberty and security. The Court has also stressed that detention grounds must be individualized and that courts must explain why conditional measures less harmful than detention are insufficient. This is a powerful reminder that detention does not dissolve innocence. A detained defendant remains legally innocent, and detention is lawful only if its exceptional justification is clearly demonstrated. (Kararlar Bilgi Bankası)
That connection between innocence and detention is also consistent with European human-rights law. The European Court of Human Rights’ Article 6 and Article 5 materials treat innocence and liberty as closely related: a person charged with an offense must be presumed innocent, and a person detained pending trial is entitled to judicial scrutiny, relevant and sufficient reasons, and release where detention is not justified. Turkish constitutional case-law echoes that logic by stressing that liberty is the rule and detention the exception. For Turkish defense practice, this means the presumption of innocence is not only a trial argument about ultimate guilt. It is also a live liberty argument in detention objections, release requests, and periodic detention reviews. (ECHR-KS)
The presumption of innocence also affects how courts must write their judgments. Because Article 141 of the Constitution requires reasoned judicial decisions and the Code requires the court to explain which evidence it accepted and rejected, a conviction cannot lawfully rest on vague impressions or language that assumes guilt without demonstrating it. A proper criminal judgment in Turkey must show how the lawful evidence proved the charged offense and why the defense arguments were rejected. This is not merely a good drafting habit. It is part of the substantive protection of innocence. If the court is required to reason from lawful proof to guilt, then it is less able to smuggle assumptions or reputational judgments into the result. The presumption of innocence therefore exerts pressure on the quality of judicial reasoning itself. (Anayasa Mahkemesi)
In practice, one of the most common threats to the presumption of innocence is casual or premature language. Police briefings, administrative reports, political statements, media summaries echoing official sources, and even poorly phrased judicial decisions can present a suspect as though guilt were already established. Turkish Constitutional Court jurisprudence makes clear that the guarantee is concerned not only with the final result of the criminal case but also with the language used during the period before guilt has been determined according to law. That does not ban all public communication. Authorities may still inform the public that an investigation or prosecution exists. But they must do so without transforming suspicion into declared culpability. For lawyers, judges, and institutions alike, linguistic discipline is therefore part of respecting the presumption of innocence. (Kararlar Bilgi Bankası)
The presumption of innocence is also closely linked to acquittal culture in Turkish criminal law. If the prosecution carries the burden of proof and the accused need not prove innocence, then doubt has a legal direction: unresolved doubt does not justify conviction. Although the doctrine is often expressed in practice through the broader criminal-law logic of proving guilt beyond lawful judicial satisfaction, the Constitutional Court’s statement that innocence is essential and the burden of proof lies with the claimant reflects the same underlying rule. In functional terms, this means that evidentiary uncertainty should not be resolved against the defendant merely because suspicion is strong, public opinion is hostile, or the accusation is serious. A system faithful to the presumption of innocence must accept acquittal where lawful proof falls short. (Kararlar Bilgi Bankası)
The European Court of Human Rights’ current key theme on the presumption of innocence offers a useful comparative lens. It explains that Article 6 § 2 contains two main dimensions: first, it prohibits premature expressions of guilt before conviction; second, it can continue to protect a person in later linked proceedings after the criminal case has ended. That structure closely resembles the Turkish Constitutional Court’s own two-aspect analysis. The convergence is important because Turkish constitutional fair-trial rights are interpreted in light of Convention guarantees. This means the presumption of innocence in Türkiye sits within a broader European rule-of-law framework as well as a domestic constitutional one. (ECHR-KS)
From a defense perspective, the practical implications are clear. A lawyer invoking the presumption of innocence in Turkey should not limit the argument to a closing statement at trial. The principle can be used much earlier and much more broadly: to object to prejudicial public statements, to challenge prosecutorial or administrative language implying guilt, to oppose detention reasoning that treats accusation as conviction, to insist that the burden of proof remains with the prosecution, to challenge the use of unlawfully obtained evidence, and to resist later attempts to undermine the effect of an acquittal. In other words, the presumption of innocence is not just a final-stage principle. It is a working defense principle active at every procedural stage. (Kararlar Bilgi Bankası)
The same principle also carries institutional obligations for courts and prosecutors. Prosecutors must remember that suspicion authorizes investigation, not declaration of guilt. Trial courts must remember that detention is exceptional and that conviction must be based on lawfully obtained evidence discussed in court. Higher courts and later proceedings must remember that an acquittal is not something to be rhetorically emptied by continuing to describe the person as though the accusation had in fact been proven. Public institutions must remember that informing the public about a case is lawful, but implying guilt before conviction is not. The presumption of innocence therefore functions as a restraint not only on outcome, but also on institutional tone, procedure, and reasoning. (Kararlar Bilgi Bankası)
Ultimately, the presumption of innocence in Turkish criminal law is one of the clearest indicators of whether criminal justice is being administered under the rule of law. It requires the State to prove guilt rather than forcing the individual to prove innocence. It restrains official language before conviction. It survives in meaningful form after acquittal. It limits detention by reminding courts that a detained person remains innocent in law. And it works together with the lawful-evidence rule and the duty of reasoned judgment to keep criminal adjudication anchored in proof rather than suspicion. In Türkiye, as in any legal system committed to fair trial, the presumption of innocence is not merely a humane ideal. It is a binding legal rule that protects the accused from the moment of charge until guilt is established according to law, and in some respects even beyond that point when acquittal has to be respected by later authorities. (Anayasa Mahkemesi)
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