Facial recognition technology in law enforcement: Regulating data analysis of another kind

Facial recognition technology (FRT) has emerged as a powerful tool for law enforcement, enabling the automated identification of individuals based on their unique facial features. Authorities have more and more made use of the technology to enhance criminal investigations through the analysis of images and video footage. In view of its increased use in Europe, this paper explores the legal implications of FRT in law enforcement under EU law and evaluates approaches to regulation. FRT use constitutes biometric data processing and comes with a particularly sensitive analysis of data. Its specific nature is grounded in the creation of a new (biometric) quality of data in order to subsequently compare for matches. Due to its impact on fundamental rights, this approach differs from conventional forensic analyses and must be appropriately regulated. Such regulation should consider the multiple data processing steps and reflect each step's impact on fundamental rights. From this procedural stance, the shortcomings of the EU Artificial Intelligence Act (AI Act) become evident. The AI Act contains specific rules for biometric AI systems but does not provide the necessary legal bases to justify FRT use by law enforcement. Without a comprehensive legal framework, such use is not permitted. This article provides concrete guidelines for addressing such regulation.