ISO/IEC 17025 accreditation serves as the primary benchmark for forensic laboratories to demonstrate their commitment to quality and the delivery of reliable analytical results. In the courtroom, this accreditation is frequently accepted as a guarantee of scientific accuracy. However, several recent events underscore the limitations of such an assumption. High-profile instances of laboratory errors—including the Randox toxicology scandal, the Maryland State Police laboratory's decade-long use of single-point calibration for blood alcohol testing, and methodological failures at the University of Illinois Chicago Analytical Forensic Testing Laboratory—demonstrate how significant scientific problems can persist for years within accredited laboratories. In the United States, this issue is complicated by a highly centralized system in which just two organizations accredit more than 99% of providers. This oversight process relies heavily on a peer-review model, in which assessor pools are drawn largely from within the forensic laboratory community. Such a closed system can allow serious methodological flaws to go undetected. Reforms are needed to increase transparency, strengthen independent oversight, enhance whistleblower protections, and incorporate non-forensic ISO/IEC 17025 assessors to provide more objective oversight. • Accreditation is a starting point, not an end point, for quality. • Forensic accreditation in the U.S. is dominated by two vendors. • Assessor pools are largely drawn from the forensic community. • Recent scandals reveal the limits of accreditation oversight. • Greater transparency, oversight, and cross-disciplinary review are needed.
Olson et al. (Fri,) studied this question.