HFSC firearms team validating 3D virtual comparison microscopy to speed casework and support remote reviews

Sep 11, 2026

Firearms staff described a two-phase validation of 3D virtual comparison microscopy (VCM) using CADRE Forensics equipment: instrument validation is complete; phase two will test examiners with paired virtual and light-microscopy comparisons to show equivalency and improve efficiency.

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Melissa Nalley, firearms operations coordinator, explained HFSC's phased validation of virtual comparison microscopy (VCM), a 3D-scanning approach intended to complement traditional light comparison microscopy. "We've had to have two separate plans to get through in order to validate this new technology," Nalley said, noting instrument validation is complete and staff are now testing examiners with paired VCM and LCM comparisons.

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