Argentina opens a new chapter in the history of justice.. Fingerprints become a decisive piece of evidence in an early criminal case

The integration of dactyloscopy into the Argentine judicial system has transformed forensic verification, shifting the standard of proof from a zero-percent reliance on biometric data to a system where a single latent print offers a mathematical probability of identity exceeding 1 in 64 billion. This transition effectively ends the era of reliance on subjective testimony—historically the primary pillar of South American jurisprudence—and establishes a framework where immutable physical markers serve as the cornerstone of judicial truth.

Historically, Argentine courts functioned under a civil law tradition that prioritized a judge’s internal conviction, often derived from eyewitness accounts and circumstantial narratives, over physical evidence. During the late 19th century, this reliance led to high rates of wrongful identification across the region. In neighboring Uruguay, legal scholars noted that the absence of verifiable biological data caused conviction rates to fluctuate based on the rhetorical efficacy of attorneys rather than the empirical validity of facts. By adopting the Galton-Henry classification method—which categorizes fingerprints into distinct loops, whorls, and arches—Argentina has raised the objective threshold for legal proof.