The digital revolution has introduced technological advancements that are transforming contemporary society (Santos, 2024), while also bringing unprecedented challenges to criminal procedure, profoundly altering the way digital evidence is collected, processed, and used (Valente, 2018). The use of artificial intelligence (AI) in obtaining digital evidence, while offering efficiency, raises questions about its admissibility in light of fundamental rights and procedural legality (Monteiro, 2023). Thus, a brief analysis of the role of AI in obtaining digital evidence within the Portuguese and European legal context is sought, with a focus on the most recent case law and the challenges related to the protection of defence rights, privacy, and the integrity of evidence.
Considering that AI, through advanced techniques such as machine learning and predictive analysis (Monteiro, 2023), has shown potential to optimize the collection and analysis of large volumes of digital data, concerns arise regarding its compatibility with fundamental rights, such as privacy and the right to a fair trial (Fidalgo, 2022).
In Portugal, the Cybercrime Law and the Code of Criminal Procedure regulate digital evidence, but they do not specifically address AI, highlighting the need for legislative adaptation (Conde Correia, 2014). This can be inferred, for instance, from the Supreme Court's ruling of October 11, 2023, case no. 184/12.5TELSB-R.L1-A.S1, which addressed the issue of seizing electronic communication data in the context of a criminal investigation.
Therefore, it is safe to say that AI offers advantages by allowing for the quick and efficient analysis of large volumes of data, but it raises concerns about the transparency of algorithms, often considered "black boxes," which jeopardizes the right to defence (Fidalgo, 2022). In this regard, the Court of Justice of the European Union (CJEU) ruled in the Ministerio Fiscal and Digital Rights Ireland cases, emphasizing the need to ensure that data collection respects fundamental rights.
In summary, digital evidence faces various challenges due to its volatility and immateriality, which may compromise its integrity and admissibility (Monteiro, 2023), thus highlighting the need for legislative reform (Conde Correia, 2014).
Works cited
Doctrine
Correia, João Conde, Prova digital: as leis que temos e a lei que devíamos ter, in Revista do Ministério Público 139, 2014.
Fidalgo, Sónia, A utilização de inteligência artificial na obtenção de prova digital em processo penal, Instituto Jurídico, Faculdade de Direito da Universidade de Coimbra, 2022.
Monteiro, António Pedro Pinto, Garantias Processuais e Prova Digital, III Jornadas a Sul do Direito Civil e Processual Civil”, Universidade de Évora, 2023.
Santos, Margarida, A inteligência artificial, a obtenção da prova digital e a (des)proteção dos direitos fundamentais – breves considerações, 9° Congresso Internacional de Direito da Lusofonia: Governação, Justiça e Desenvolvimento Sustentável, 2024, in press.
Valente, Manuel Monteiro Guedes, O Reforço dos Princípios Constitucionais na Obtenção de Prova no Mundo Digital, in RDPJ, ano 2 n.º 3, 2018.
Jurisprudence