Proteins Emerge as a Promising New Layer in Forensic Science's Genetic Toolkit

The forensic science community has long relied on DNA as the gold standard for biological identification, but a growing body of research suggests that proteins may be poised to carve out a meaningful role alongside genomic methods. A recent analysis from Technology Networks examines whether proteomics could become the next serious tool in forensic identification, a question that carries significant implications for laboratories and genetic testing professionals who work at the intersection of molecular biology and justice systems.

The Technology

Proteins, unlike DNA, can persist in environments and biological samples where nucleic acids degrade beyond usability. Hair shafts, ancient bone, heavily weathered biological material, and certain forensic specimens that routinely fail DNA extraction protocols may still yield recoverable protein sequences. Mass spectrometry-based proteomics, which has matured considerably over the past decade, now offers sensitivity and specificity sufficient to identify individual protein variants — including those encoded by single nucleotide polymorphisms in the underlying genome. This means that protein sequencing can, in some cases, serve as a proxy for genetic information, allowing investigators to infer ancestry, biological sex, and potentially other physiological characteristics from samples that would otherwise be forensically silent.

Clinical Context

The convergence of proteomics and forensic science sits within a broader trend of multi-modal molecular identification that genomics professionals will recognize from precision medicine. Just as liquid biopsy developers have learned to integrate genomic, epigenomic, and fragmentomic signals to improve sensitivity, forensic laboratories are beginning to explore whether layering protein data on top of — or in the absence of — DNA data can expand case resolution rates. The human identification market, which a Grand View Research report recently projected for substantial growth through 2033, encompasses both law enforcement and humanitarian applications such as disaster victim identification and missing persons investigations. Proteomics could meaningfully expand the addressable case pool within that market by recovering information from samples previously classified as unsuitable for analysis.

What's Next

For the genetic testing industry, the maturation of forensic proteomics raises important questions about laboratory infrastructure, validation standards, and regulatory frameworks. Labs that have invested heavily in next-generation sequencing platforms will need to evaluate whether mass spectrometry workflows warrant parallel investment, and accreditation bodies will eventually face pressure to develop proficiency standards for protein-based forensic identification. The field also intersects with privacy considerations that genomics stakeholders know well, since protein variants can reveal heritable traits in ways that carry consent and data governance implications similar to those surrounding consumer and clinical DNA testing.

As proteomics technology continues to mature and validation datasets expand, its integration into forensic workflows could fundamentally broaden the scope of biological identification and set a new standard for what comprehensive molecular evidence means in both courtrooms and clinical settings.