From Assumption to Conviction: an Evaluation of the ECtHR’s Decision in Demirer v. Turkey

By dr. Ufuk Yeşil

Is crossing the border with the wrong person enough to convict you of terrorism?

On March 25, 2025, the Second Section of the European Court of Human Rights (ECHR) delivered its judgement in Demirer v. Turkey, addressing the perplexing case of Serferaz Demirer, who faced conviction for purportedly being a member of an armed terrorist organisation. This ruling raises significant questions about the boundaries of justice and the right to a fair trial enshrined in Article 6 § 1 of the European Convention on Human Rights (ECHR). The core of the decision revolved around whether the Turkish courts had fulfilled their obligation to provide reasoned judgements and whether Demirer’s defence had been adequately considered. By a vote of five to two, the Court concluded that the Turkish judiciary had not violated Demirer’s rights, arguing that the courts had provided sufficiently reasoned judgements and adequately considered her defence. However, the dissenting voices drew attention to perceived deficiencies in the reasoning, illuminating potential cracks in the judicial process.

As the details of this case are explored, can we truly accept that crossing a border with the wrong company could justify a charge as severe as terrorism? This blog post presents the background of the case, analyses the ECHR’s rationale for ruling no violation, and considers the criticisms of the judgement, thereby offering a comprehensive understanding of its complexities and broader implications.

Summary of the Judgement: Facts and Judicial Proceedings

Serferaz Demirer, a Turkish citizen born in 1994, was apprehended on 10 January 2016 while attempting to cross illegally from Syria into Turkey, alongside a woman identified as Ş.A. (§ 5). Stopped by military personnel, the two presented themselves as Syrian nationals with false identity details, but their true identities were uncovered through fingerprint verification. In her initial statement to the gendarmerie, Ş.A. admitted to having attended training camps of the PYD/YPG—a group designated as a terrorist organisation by Turkey—where she received ideological and armed training, and was subsequently sent to Turkey by the organisation (§ 6). In contrast, Demirer claimed she had travelled to Syria for a relative’s wedding and crossed the border illegally due to financial constraints, denying any affiliation with the group (§ 7). According to a gendarmerie report, during her interrogation, Demirer reacted to the Kurdish interpreter, B.S., by calling them a “traitor” (§ 9).

During the trial, Ş.A. retracted her initial statement, asserting she had gone to Syria for adventure (§ 13). Nevertheless, on May 24, 2016, the Mardin Assize Court convicted both defendants under Article 314 § 2 of the Turkish Penal Code (TCK) for membership in an armed terrorist organisation, sentencing each to nine years’ imprisonment (§ 14). The court relied on Ş.A.’s initial statement and deemed Demirer’s actions—being caught with Ş.A., using a false identity, and her remark to the interpreter—as evidence of organisational membership, dismissing her wedding explanation as “not credible.” One judge dissented, arguing for the applicant’s acquittal on grounds that the defendants did not know each other, Ş.A. had stated she first saw Demirer at the border, and there was no concrete evidence linking Demirer to the organisation (§ 15). On February 1, 2017, the Court of Cassation upheld the conviction with standard, boilerplate reasoning (§ 19), and on May 7, 2018, the Constitutional Court rejected Demirer’s individual application as “manifestly ill-founded” (§ 21-22). Demirer then applied to the ECtHR, alleging that the domestic courts had rendered arbitrary, unreasoned decisions and failed to consider her defence (§ 26).

The ECtHR, by a majority, ruled that the domestic courts had complied with their obligation to provide reasoned judgements and that the decisions were not arbitrary (§ 47). However, Judges Seibert-Fohr and Lavapuro dissented, highlighting the lack of sufficient reasoning in the domestic courts’ rulings (§§ 1–9, dissenting opinion).

The ECtHR’s Assessment: an Endorsement of Domestic Rulings?

The ECtHR found no violation, concluding that the domestic courts had adequately applied the principle of reasoned decisions, a cornerstone of the right to a fair trial. The majority held that the Mardin High Criminal Court had substantiated Ş.A.’s membership in the organisation by citing (i) the duration of her membership, (ii) her use of a code name, and (iii) her illegal entry into Turkey under the group’s orders (§ 41). As for Demirer, the court considered (i) her apprehension alongside Ş.A., (ii) her use of a false identity, and (iii) her “traitor” remark to the interpreter sufficient to justify her conviction for membership. The majority deemed these elements consistent with the Court of Cassation’s jurisprudence and rejected Demirer’s wedding defence as “not credible” (§ 44).

Under Article 314 § 2 of the TCK, the Court of Cassation has established criteria for organisational membership, including an “organic link,” “participation in a hierarchical structure,” and typically “continuous, diverse, and intensive activities” (§ 40). However, it also acknowledges that a single act—depending on its nature, execution, and the harm or risk it creates—may suffice for membership (§ 25). The majority framed Demirer’s joint movement with Ş.A. and her use of a false identity within this framework (§ 43). The local court explicitly stated that it found Demirer’s claim of travelling alone to a wedding and being caught on her return “wholly unconvincing” (§ 14). The Court of Cassation’s affirmation that “the evidence was appropriately assessed and the defences reliably dismissed” bolstered this stance (§ 19). Citing García Ruiz v. Spain, the ECHR noted that a higher court need not provide detailed reasoning when it agrees with the lower court (§ 26, § 45).

The majority emphasized that for a decision to be deemed arbitrary, it must be either unreasoned or manifestly erroneous (Moreira Ferreira v. Portugal, § 85)—a threshold not met in this case (§ 43). It held that the domestic court had based its decision on various pieces of evidence, all of which were open to challenge by the applicant. Ultimately, the ECtHR found no violation, ruling that the domestic courts had addressed the key issues and provided sufficient reasoning (§ 47).

Commentary

The Right to a Fair Trial: a Fundamental Principle at Risk?

This judgement raises profound questions about the essence of the right to a fair trial. The majority’s acceptance that the domestic courts fulfilled their obligation to provide reasoned judgements conflicts with the ECtHR’s own established practices and casts doubt on whether Demirer underwent a fair judicial process. The reasons are as follows:

The Mardin Assize Court, in applying Article 314 § 2 of the TCK, failed to adequately reflect the Court of Cassation’s criteria of an “organic tie,” “participation in a hierarchical structure,” and “continuous, intensive activities” in Demirer’s case. According to the Court of Cassation’s jurisprudence, a single act may suffice for membership only if it demonstrably serves the organisation’s aims and poses a clear harm or risk (§ 25). Yet, the court merely listed Demirer’s apprehension with Ş.A., her false identity, and her “traitor” remark, without explaining how these satisfied the “participation in a hierarchical structure” element, stating only that “the course of events demonstrates this” (§ 14). This constitutes an assumption rather than a concrete rationale, contravening the Court of Cassation’s explicit standards and the principle that guilt must be proven beyond reasonable doubt.

Moreover, Demirer’s conviction based largely on the assumption of her coordinated actions with Ş.A., rather than concrete evidence. While Ş.A.’s initial statements may prove her own membership, the ECtHR’s judgement reveals no tangible evidence of an organic link between Demirer and the organisation. Illegal border crossing, false identity use, or an offensive remark may raise suspicion, but they fall far short of the Court of Cassation’s criteria of “organic connection” or “continuous, varied, and intensive activities.” The court offered no assessment demonstrating Demirer’s knowing and willing participation in the organisation or her role within its hierarchy. This echoes the legal foreseeability issues highlighted in Selahattin Demirtaş v. Turkey (No. 2) regarding the broad interpretation of Article 314 (§ 43).

As for Demirer’s defence, her wedding claim was dismissed as “not credible” without further explanation (§ 14). This approach not only disregarded her defence but also placed the burden of proving innocence on her—a violation of fair trial principles and challenging the principle of the presumption of innocence. The court’s assertion, on the other hand, that “there was no evidence that could possibly be interpreted in favour of Serferaz Demirer” raises concerns about procedural fairness and equitable treatment of defendants within judicial proceedings. By failing to provide adequate rationale and uphold the presumption of innocence, the court’s actions invite scrutiny regarding adherence to established human rights standards.

As underscored in Yüksel Yalçınkaya v. Turkey, courts must provide clear and specific responses to defence arguments that could affect the outcome (§ 305). In Yalçınkaya, the failure to adequately address challenges to the reliability and evidential value of ByLock data was deemed a violation of the right to a defence (§ 93, § 105). Similarly, Demirer’s claim here was neither seriously examined nor met with a reasoned rebuttal.

The Yalçınkaya judgement further cautioned against courts proving guilt through assumptions (§ 264), ruling that treating ByLock use as automatic proof of membership without sufficient justification was unacceptable. This restricted the defendant’s ability to effectively exercise their defence rights, breaching fair trial standards. A parallel issue emerges in Demirer: the Mardin court did not substantively explore the nature of Demirer’s relationship with Ş.A., her organisational ties, or any hierarchical role, instead deeming “joint action” and the “traitor” remark sufficient for a serious offense. This superficial approach suggests Demirer was not afforded a fair hearing and that the court relied on presumptions.

The majority’s acceptance of the Court of Cassation’s formulaic affirmation that “the evidence was appropriately discussed” (García Ruiz reference, § 45) also clashes with prior ECHR rulings. In Yalçınkaya, the Grand Chamber criticized domestic courts for issuing decisions with generic phrases absent sufficient and relevant reasoning (§ 304). Here, too, the Court of Cassation rubber-stamped the ruling without detailed scrutiny (§ 19), undermining the ECHR’s fair trial standards and fostering the impression of inconsistent oversight of Turkey’s terrorism cases. As noted in Moreira Ferreira, an unreasoned decision may amount to a “denial of justice” (§ 38). Lacking a concrete evaluation of Demirer’s organisational ties and resting solely on her proximity to Ş.A. and a few actions, this ruling teeters on that edge. This heightens legal unpredictability, making it difficult for individuals to discern which actions may be deemed criminal—a concern previously flagged in Demirtaş and Yalçınkaya.

In sum, the Turkish courts failed to apply the requisite criteria under Article 314 § 2, neglected to present concrete evidence, summarily dismissed the defence, and provided inadequate reasoning. The ECHR’s overlooking of these shortcomings contradicts its own jurisprudence and risks legitimizing deficiencies in Turkey’s judicial oversight.

Dissenting Opinion: a Call for Reasoned Decision-Making

The dissenting opinion of Judges Seibert-Fohr and Lavapuro aligns with these critiques. They argued that the Mardin Assize Court failed to adequately justify Demirer’s conviction, a flaw unremedied by higher courts (§ 1, dissenting opinion). The Court of Cassation’s criteria of an “organic tie” and “continuous, diverse, intensive activities” were not applied; the court merely asserted that “the course of events demonstrates this” (§ 7). No concrete assessment established Demirer’s knowing participation in the organisation, and the reasoning fell short of resolving key issues (§ 8). Referencing Selahattin Demirtaş (No. 2) and Yüksel Yalçınkaya judgements, the dissenters noted that the broad interpretation of Article 314 and the courts’ failure to clarify this ambiguity undermines fair trial rights (§ 5-6). They concluded that the obligation to provide reasoned decisions—and thus Demirer’s rights under Article 6 § 1—had been violated (§ 9).

Beyond the Judgement: a Roadmap for Fair Trial Standards

The ECHR’s finding of no violation in Demirer v. Turkey raises significant concerns about the reasoned decision-making facet of the right to a fair trial. For Turkish courts, establishing criminal elements with concrete evidence, coherent reasoning, and beyond reasonable doubt is a fundamental requirement of the rule of law. This requires courts to proactively investigate the truth, gather evidence favouring the defendant, and avoid relying solely on prosecution claims. Yet in Demirer’s case, defences like the wedding claim were not investigated, and the decision rested on presumptions rather than proof of organisational ties. Moreover, the principle of “innocent until proven guilty” was disregarded, with suspicion interpreted against the defendant based on contradictory statements and weak inferences. In terrorism cases especially, the Court of Cassation’s criteria—such as “organic tie” and “continuous, diverse, intensive activities”—must be meticulously applied to each defendant, eschewing assumptions. Dismissing defences as “not credible” without detailed rebuttals, as in Demirer’s case, undermines the fairness of judicial proceedings.

For the ECtHR, upholding the standards emphasized in its own jurisprudence is paramount. When assessing the adequacy of domestic judgements, it must conduct deeper scrutiny and refrain from endorsing unreasoned or arbitrary decisions. In Demirer, the Turkish courts’ failure to investigate ex officio, collect exculpatory evidence, and adhere to a strict evidential standard demonstrably impaired fair trial rights. The ECHR’s dismissal of these grave deficiencies deviates from its established norms and risks emboldening judicial arbitrariness in Turkey. Turkey’s counterterrorism practices are marred by systemic issues extending far beyond this case. Overly broad and vague legal definitions of terrorism offenses lead to unjust prosecutions, with convictions often based on inferred intent or indirect associations rather than concrete evidence. Due to penalties imposed on the basis of unproven suspicions and Turkey’s judicial practices, the “presumption of innocence” has effectively been transformed into a “presumption of guilt.”

A more vigilant approach to the legal foreseeability and defence rights issues as identified in Selahattin Demirtaş v. Turkey (No. 2) and Yüksel Yalçınkaya would reinforce the ECHR’s role as a guardian of human rights. Such oversight could encourage Turkish courts to deliver more transparent and reasoned judgements. Ultimately, collaboration between these judicial bodies to fully safeguard fair trial rights is a critical step toward bolstering trust in the law at both national and international levels. Notably, the ECHR Grand Chamber’s hearing scheduled for May 7, 2025, offers an opportunity for a clearer, more resolute stance on Turkey’s problematic counter-terrorism practices—particularly the legal unpredictability and arbitrary convictions seen in Yasak v. Turkey. This could mark a turning point, addressing not only individual rights violations but also systemic injustices to strengthen the rule of law. Additionally, Demirer v. Turkey could also serve as a compelling case for reconsideration by the Grand Chamber, exemplifying the need for the court to reaffirm its standards regarding reasoned decision-making, as articulated in its own jurisprudence.

Conclusion

The Demirer v. Turkey judgment underscores a troubling trend in the adjudication of terrorism-related cases: convictions based on assumption rather than substantiated proof. The Turkish courts’ reliance on tenuous inferences rather than concrete evidence has led to a conviction that arguably violates the core principles of the right to a fair trial. More concerning still is the ECtHR’s endorsement of such reasoning, which departs from its own jurisprudence and risks normalizing deficient judicial practices in politically sensitive cases. At a time when judicial independence and legal certainty are under increasing threat, especially in the context of counter-terrorism, the ECtHR must serve as a bulwark against arbitrary prosecution and conviction. The Grand Chamber’s forthcoming hearing and judgment in the Yasak v. Turkey case presents an opportunity to recalibrate this trajectory. By reaffirming its commitment to legal foreseeability, the presumption of innocence, and the requirement of reasoned judgments, the Court can provide much-needed guidance to domestic courts and restore confidence in human rights protections across Europe. Ultimately, Demirer should not become a precedent for lowered fair trial standards, but rather a catalyst for their reinforcement. The path forward lies in judicial vigilance, principled consistency, and the unwavering defence of the rights enshrined in the Convention.