Hueske%20-FA-TM%20-%20intro-09%20rev

Hueske20 fa tm20 20intro 0920rev

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Unformatted text preview: Firearms/Tool Mark Examination Firearms/Tool Mark Examination Firearms types Firearms types Firearms types Firearms types Shotgun – smooth bore (no rifling) Shotgun – smooth bore (no rifling) Fundamentals of Firearm & Toolmark Identification Definition: Impressed Toolmark Definition: Features produced when a tool contacts an object with enough compressive force that it leaves an impression. Fundamentals of Firearm & Toolmark Identification Definition: Striated Toolmark Definition: Features produced when a tool contacts an object with lateral force and motion. Class characteristics Class characteristics ► Handguns & Rifles ► ► ► ► ► ► Caliber Number of lands/grooves Land/groove dimensions Type of rifling Direction of twist Twist rate ► Shotguns ► ► Gauge Shot size Fundamentals of Firearm & Toolmark Identification Examples of Class Characteristics Known Source: Known Source: Rifling Questioned Item: Bullet Fundamentals of Firearm & Toolmark Identification Examination Process Examination Process Level 1 analysis ­ Class Characteristics Elim...
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