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Pattern/Impression Scientific Area Committee

The Pattern/Impression Scientific Area Committee (SAC) provides strategic direction, serves as a platform to integrate similar standards activities across multiple forensic science disciplines, and manages the activities of the following subcommittees:

Footwear & Tire

Friction Ridge

Firearms & Toolmarks

Forensic Document Examination

Members

Henry Swofford, SAC Chair, National Institute of Standards and Technology

Gerry LaPorte, SAC Vice Chair, Department of Homeland Security Laboratory

Joshua Connelly, Friction Ridge Subcommittee Chair, Douglas County Sheriff's Office

Anthony Koertner, Footwear & Tire Subcommittee Chair, U.S. Army Criminal Investigation Laboratory

Mary (Meg) O'Brien, Forensic Document Examination Subcommittee Chair, U.S. Secret Service

Todd Weller, Firearms & Toolmarks Subcommittee Chair, Weller Forensics, LLC

Alicia McCarthy, SAC Member (Human Factors), Thomas College

Sarah Pryor, SAC Member (Quality), Texas Department of Public Safety Crime Laboratory

Raymond Valerio, SAC Member (Legal), Queens District Attorney's Office

Vacant, SAC Member (Statistics)

Documents in Process

Standard Guide for Developing Discipline-Specific Methodology for ACE-V (currently at an SDO)

Presentations

OSAC Public Update Meeting: Physics/Pattern Interpretation SAC Updates, June 2019

International Association for Identification (IAI): OSAC Physics/Pattern Interpretation SAC Update, August 2018

Created July 14, 2014, Updated November 17, 2025
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