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Commission adopts minimum blind verification requirement for firearms comparisons
Summary
Following recommendations from a working group, the commission adopted a policy requiring a minimum of blind verification for firearms/toolmark comparisons (5% of cases or specific minimums) beginning Nov. 1, 2025, subject to non-substantive revisions.
The commission adopted a recommended blind-verification policy for firearms and toolmark comparison cases developed by a multi-agency working group convened after a prior investigative report.
Working-group members described two related efforts: a method-performance worksheet that will help examiners calculate case-specific factors affecting comparison error rates, and a blind-verification policy that sets a minimum floor for blind…
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