Are current criminal procedure rules sufficient to address the unique challenges posed by AI evidence? This is the central question explored in the edited volume ‘AI Evidence in Criminal Proceedings’. The book presents the results of the CRIM_AI Project, a four-year research project led by Professor Katalin Ligeti and funded by the Luxembourg National Research Fund. Bringing together experts in criminal law, data protection, and computer science, alongside practitioners and policymakers, the project examined the challenges related to the evidentiary use of AI through a comparative analysis of six jurisdictions: Germany, France, Luxembourg, the Netherlands, the U.K., and the U.S. Can evidence generated or processed by AI be trusted? What safeguards exist for the defendant? Addressing these questions, the volume contributes to the scholarly debate, offers practical guidance for law enforcement and legal practitioners, and proposes solutions to inform policy choices at both national and supranational level.