The NIST Hair Comparison Study

The NIST Hair Comparison Study, conducted by the National Institute of Standards and Technology, evaluated how reliably forensic experts can match hair samples to individuals. Participants compared known reference hairs to unknown samples, and their accuracy was measured. The study found that experts were generally consistent in their comparisons, but misidentifications could occur, especially with similar hair types or conditions. It highlighted the importance of standardized procedures and awareness of limitations in hair analysis, helping to improve forensic practices and the weight given to hair evidence in criminal investigations.