Abrasion collar

A feature of gunshot wounds

Abrasion collar is a term used in forensic pathology to describe a specific type of injury pattern associated with gunshot wounds. It is a crucial feature that helps forensic experts determine the characteristics of the wound and the direction of the projectile.

Description

An abrasion collar, also known as a "marginal abrasion," is a ring of abraded skin that surrounds the entrance wound of a bullet. This abrasion occurs as the bullet penetrates the skin, causing the outer layers to scrape against the projectile. The presence and characteristics of an abrasion collar can provide valuable information about the angle and direction of the bullet's entry.

Characteristics

The abrasion collar is typically characterized by:

• Color: The collar often appears as a reddish-brown ring around the entrance wound.
• Width: The width of the abrasion collar can vary depending on the angle of entry and the type of projectile.
• Shape: The shape of the collar can indicate the angle of the bullet's entry. A circular collar suggests a perpendicular entry, while an oval or irregular shape may indicate an angled entry.

Forensic Significance

The analysis of an abrasion collar is an important aspect of forensic investigations involving firearm injuries. It can help determine:

• Direction of Fire: By examining the shape and distribution of the abrasion collar, forensic experts can infer the direction from which the bullet was fired.
• Range of Fire: The presence of additional features, such as gunpowder tattooing or stippling, in conjunction with the abrasion collar, can help estimate the range of fire.
• Type of Weapon: The characteristics of the abrasion collar, along with other wound features, can assist in identifying the type of firearm used.

Related Pages

• Gunshot wound
• Forensic pathology
• Ballistics
• Stippling
• Gunpowder tattooing