Forensic Analysis of Gunshot Wounds

Gunshot Wounds

• Entrance gunshot wounds typically have an abrasion rim, tissue invagination, and outward beveling of the tissue. Smaller wounds may also be present.
• When preserving clothing with alleged bullet holes, do not fold the clothing. Carefully remove the cloth and allow it to dry. Put the clothing in a plastic bag.

Gunpowder Analysis

• Gunpowder residue can be detected in paraffin. Brown and blue flecks can be indicators of gunpowder.
• Materials designed to deflagrate or burn rather than explode are categorized as low explosives.

Cartridge Characteristics

• Cartridges are designed to be a convenient, pre-assembled package and for easy handling and transportation.

• Cartridge cases (the part of the cartridge that contains the primer, propellant, and projectile), have specific features, like a bottleneck, case neck, case body, case shoulder, and straight walls

• These components can be identified and compared to other cartridge components to assist in investigations

Bullet Characteristics

• Specialized bullets, like tracer bullets, have specific characteristics.
• Bullets designed for explosive or incendiary purposes are also identified for their distinct composition, to assist in investigations

Marks on Firing Cartridge Cases

• Fired (and unfired) cartridge cases often have unique marks that are unique to the specific firearm.
• Examples of marks on cartridge cases include: impressed action marks (such as extractor marks, breech marks, and firing pin impressions), striated motion marks and ejector marks.

This quiz explores the key concepts related to gunshot wounds, gunpowder analysis, and cartridge characteristics. Learn about the distinctive features of entrance wounds, the identification of gunpowder residues, and the structure of cartridges. Perfect for students in forensic science or criminal investigations.