This article explores the role of forensic investigations in the field of crime. Having a crucial impact on the conduct of trials and the administration of justice, forensic science has evolved from an auxiliary discipline into a central pillar of the modern criminal justice system. Forensic sciences have developed over the years, bringing a multidisciplinary approach that allows for the precise reconstruction of the chronology of events. They rely on the contributions of medical sciences and several laboratory techniques integrating new technologies, which optimize the collection of biological evidence while minimizing the risk of contamination. Furthermore, digital forensics has become indispensable today for processing hybrid evidence (physical and virtual). Finally, the article highlights the challenges and regulatory standards imposed by these advances, calling for an international standardization of protocols to guarantee the impartiality of judicial decisions in the face of the increasing complexity of criminal operating methods.