University of Washington statistician urges shift from profile probabilities to match probabilities in forensic DNA reporting Dr. Bruce Weir presented empirical and theoretical evidence that multiplying single-locus genotype frequencies can understate match probabilities as more loci are used, and he recommended the likelihood-ratio/match-probability framework and larger theta values to avoid overstating evidence.

Dr. Bruce Weir is challenging the way forensic DNA evidence is reported, arguing that traditional methods could misrepresent the strength of matches and calling for a revolutionary shift in how we interpret genetic data.

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