Background
Adalet Kaya, a women’s-rights activist and president of the lawfully registered Rosa Women’s Association in Diyarbakır, was arrested in May 2020 and placed in pre-trial detention on suspicion of membership of the PKK/KCK, an armed terrorist organisation. The Turkish authorities alleged that the association was an extension of other women’s organisations linked to the PKK/KCK and relied principally on an anonymous witness, Kaya’s participation in demonstrations and press events, intercepted conversations, and materials seized from her home and the association’s premises.
Kaya denied the allegations, maintaining that the association lawfully advocated for women’s rights and that her speeches, political contacts, and attendance at public events were exercises of her democratic rights. She remained detained until 18 August 2020. The Constitutional Court summarily declared her challenge to the lawfulness of her detention inadmissible. The criminal proceedings were later stayed after Kaya was elected to Parliament in May 2023 and acquired parliamentary immunity.
The Court’s Holding
The European Court of Human Rights unanimously held that Türkiye violated Article 5 § 1 because Kaya’s initial and continued detention was not based on reasonable suspicion that she had committed the offence of membership of an armed terrorist organisation. The anonymous witness’s abstract allegations were not corroborated by sufficiently concrete evidence. The association’s lawful activities, its alleged contacts with a lawful political party, Kaya’s non-violent statements and participation in public events, and the seized publications and colored cloth did not establish a clear link between her conduct and the alleged offence.
The Court also unanimously found a violation of Article 5 § 3. Because reasonable suspicion—a prerequisite for continued detention—was absent throughout, the domestic courts had not provided a valid justification for keeping Kaya detained. It declared her Article 5 § 4 complaints inadmissible: the July 2020 extension was ordered by the trial court of its own motion rather than following a challenge to detention, and the Constitutional Court had given enough information for Kaya to understand the basis of its decision, even though Strasbourg did not endorse that reasoning.
The Court found no need to examine separately the Article 18 complaint. It awarded Kaya EUR 4,000 for non-pecuniary damage and EUR 1,000 for costs and expenses, while rejecting her pecuniary-damage claim.
Key Takeaways
- Anonymous-witness allegations may support terrorism investigations only when corroborated by objective evidence; abstract and unsubstantiated claims are insufficient.
- Lawful association work, political contacts, non-violent speech, and attendance at public events cannot, without concrete evidence of criminal involvement, establish reasonable suspicion of terrorist-organisation membership.
- Reasonable suspicion is indispensable throughout pre-trial detention; when it is absent, continued detention also violates Article 5 § 3.
Why It Matters
The judgment reinforces that authorities may not convert protected civic engagement, political expression, or association with lawful organisations into grounds for terrorism-related detention without evidence linking the individual to criminal activity. Labels, organizational theories, and ambiguous symbolic materials cannot substitute for concrete facts capable of convincing an objective observer.
It also clarifies the limits of Article 5 § 4: that provision does not govern a court’s automatic review of detention before the detainee challenges the resulting decision, and concise constitutional-court reasoning may suffice when it makes the basis for dismissal understandable.