Standard Guide for Forensic Physical Fit Examination

Abstract

5.1 This guide can assist the examiner in selecting and organizing a general analytical scheme for the evaluation and documentation of physical comparisons of materials for a potential physical fit. The type and size of material influences the exact steps and equipment needed to assess the physical fit. Evaluation, documentation, and interpretation are all important parts of a physical fit examination. 5.2 This guide addresses special considerations for physical fit analysis for glass, skeletal material, polymers, tapes and textiles. 5.3 Foundations of physical fit examination in forensic science are described in the literature, including studies on the fractography of different materials and the use of physical fit examinations in forensic casework (1-12). 5.4 It is not the intention of this guide to present comprehensive theories regarding the mechanism of fractures, tearing, cutting, or other methods of separation. This information is available from training courses and reference materials such as Practice C1256 and others (3-7, 13).