Forensic Science in Modern Justice

Passage

Forensic science encompasses the application of diverse natural and social scientific disciplines to the investigation of legal questions, providing courts with objective analytical evidence that complements witness testimony and circumstantial reasoning in both criminal and civil proceedings. The field draws upon chemistry, biology, physics, anthropology, and digital technology, among other specialisms, to examine physical evidence ranging from trace fibres and ballistic markings to biological fluids and electronic communications. DNA profiling, developed by Sir Alec Jeffreys in 1984, arguably represents the most transformative forensic innovation of the modern era, enabling the definitive identification of individuals from minute biological samples and simultaneously serving as a tool for conviction and for exoneration, with the Innocence Project in the United States having secured the release of over two hundred wrongfully convicted individuals through retrospective DNA analysis. However, forensic science has faced serious challenges to its credibility, with investigations revealing that several disciplines, including bite mark analysis, hair comparison, and certain fire investigation techniques, lacked the rigorous empirical validation required to justify the confidence with which they were presented to juries. These revelations prompted major reviews by bodies including the United States National Academy of Sciences, whose 2009 report called for standardised accreditation, independent oversight, and sustained investment in research to establish the statistical foundations underpinning forensic evidence.