American Board of Medicolegal Death Investigators (ABMDI) Practice Exam

What defines a stab wound?

1. A wound caused by blunt force

2. A sharp force injury deeper than it is wide

3. An abrasion from a sharp object

4. A shallow cut from a knife

The correct answer is: A sharp force injury deeper than it is wide

A stab wound is characterized by a sharp force injury that penetrates the skin and underlying tissues, generally being deeper than it is wide. This definition aligns directly with how stab wounds are medically classified, as they typically involve a puncture or penetrating tear caused by a pointed instrument, such as a knife or other sharp object. The depth is a significant aspect because it indicates the potential severity and internal damage that may occur, which distinguishes stab wounds from other types of trauma. Moreover, the distinction is important in forensic investigations, as it helps to determine the nature of the violence involved and can have implications regarding intent, weapon type, and the circumstances of the incident. Different forms of injury, such as blunt force trauma or abrasions, do not fit this definition and highlight why the other options are not representative of what constitutes a stab wound.