Open-Source Intelligence and the Right to a Fair Trial: Balancing Investigative Efficiency with Procedural Guarantees

Abstract Open-source intelligence (OSINT) has become a dominant investigative methodology of Western law enforcement, yet the procedural frameworks governing its use as courtroom evidence remain underdeveloped. This article examines whether the fair trial guarantees under Article 6 of the European Convention on Human Rights, equality of arms, adversarial proceedings, and the reasoned judicial evaluation of evidence, are adequate to the specific challenges OSINT presents. Drawing on the jurisprudence of the European Court of Human Rights, the article argues that the existing guarantees are doctrinally adequate to this task, and identifies the specific requirements that follow from their application to evidence of open-source origin. A comparative analysis of the United Kingdom and the Netherlands shows how two established jurisdictions handle the intelligence-to-evidence transition differently, and why neither approach has yet been translated into a procedural regime adequate to the particular features of OSINT. The Western Balkans, and Albania in particular, illustrate what follows when investigative capability is expanded through international capacity-building programmes while procedural safeguards in this specific area remain largely undeveloped. The article identifies three implications of Article 6 that domestic criminal justice systems must observe when OSINT evidence is relied upon at trial: disclosure of methodology, preservation of the material in forensically sound form at the point of collection, and defence access to the underlying data in conditions that permit independent verification. These implications are doctrinal rather than novel, and the task for domestic legislators and courts is to give them practical effect before investigative practice becomes entrenched.