1. Glass Fractures
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2. Glass How broken? Link a suspect to a crime scene Fingerprints Blood
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3. Fractures
Concentric
Radial
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6. Direction of Penetration
A projectile hole is inevitably wider at the exit side
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7. Direction of Penetration
Radial
Concentric
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8. Stress Marks
The perpendicular edge of stress marks always face the surface on which the crack originated
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9. Successive Penetrations
A fracture always terminates at an existing line of fracture
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