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AFTE Knowledge and Ability Factors

Home > Toolmark Identification > AFTE Knowledge and Ability Factors
14. Knowledge of how to properly document evidence and analytical results (through notes, sketches, photography, reports, etc.)
15. Knowledge of the techniques and procedures used to properly mark evidence (when appropriate)
26. Knowledge of definitions of class, subclass, and individual characteristics and the differences between them
27. Knowledge of the sources of class, subclass, and individual characteristics
38. Knowledge of how and when to use various vises, clamps, and restraining devices
114. Knowledge of proper use of tools and materials for test marks
116. Knowledge of the interactive nature of the tool/toolmark process and the transference of class, subclass, and individual characteristics
117. Knowledge of impressed (static) vs. striated (dynamic) toolmarks
118. Knowledge of the best agreement possible in situations of known nonmatches when comparing toolmarks
119. Knowledge of the principles of preparing test marks and the effects of test materials in the production of testfired cartridge components and toolmarks for comparison
4. Ability to select the appropriate casting materials (casting of bullets/toolmarks)
17. Ability to select proper casting material and technique (mentioned above)
19. Ability to understand and interpret technical data output from laboratory instruments
21. Ability to recognize discrepancies or inconsistencies in analytical findings and determine their cause and significance
23. Ability to recognize the limitations of tests and interpretations
41. Ability to identify reloaded ammunition as having been assembled by the same equipment by determining that specific reloading tool(s) came in contact with cartridge components
48. Ability to recognize and properly align reproducible striae arrays sufficient for identification purposes
49. Ability to recognize, determine the source of, and differentiate between class, subclass, and individual characteristics on bullets, cartridges, cartridge cases, and in nonfirearm-related toolmarks
53. Ability to distinguish between the quality and quantity of matching striae in a true identity and that observed in known nonmatches
57. Ability to recognize any manufacturer-induced characteristics
71. Ability to make determinations in toolmark comparisons (both firearm and nonfirearm toolmarks) regarding: identifications, exclusions, and inconclusives
72. Ability to recognize patterns (profiles, etc.) produced by various tool-working surfaces

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