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Unformatted text preview: Toolmark Toolmark Identification Toolmark Identification Toolmark Identification a discipline of forensic science which has as its primary concern to determine if a toolmark was produced by a particular tool.* * Association of Firearm and Tool Mark Examiners Glossary 4th Edition © Precision Forensic Testing Tools
Tool – An object used to gain mechanical advantage. Also thought of as the harder of two objects which when brought into contact with each other, results in the softer one being marked.* * Association of Firearm and Tool Mark Examiners Glossary 4th Edition © Precision Forensic Testing Toolmarks Definitions When examining toolmarks, there are two types of characteristics to consider. The first is class characteristics. Class characteristics are measurable features of a specimen which indicate a restricted group source. They result from design factors, and are therefore determined prior to manufacture.* The second type of characteristic to examine when evaluating toolmarks are individual characteristics. Individual characteristics are marks produced by the random imperfections or irregularities of tool surfaces. These random imperfections or irregularities are produced incidental to manufacture and/or caused by use, corrosion, or damage. They are unique to that tool and distinguish it from all other tools.* * Association of Firearm and Tool Mark Examiners Glossary 4th Edition © Precision Forensic Testing When discussing types of tools, we can classify them based on their design. Examples of these tools include:
Locking Pliers Needle Nose Locking Pliers Slip Joint Pliers Tongue and Groove Pliers Linemans Pliers Diagonal Cutters...
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- Spring '08