A 50-year-old man is found dead with multiple stab wounds to the chest. One wound tract in the myocardium is triangular on cross-section of the wall. Which weapon type is MOST consistent with a triangular wound track?
- A Single-edged knife
- B Bayonet or cross-shaped dagger ✓
- C Double-edged knife
- D Awl (pointed, round-section weapon)
Correct answer: B. Bayonet or cross-shaped dagger
Explanation
The shape of a stab wound track in firm tissues such as myocardium or liver can indicate weapon cross-section morphology. A triangular (three-pointed) track indicates a weapon with three cutting ridges — classically a bayonet or trifaceted stiletto. A single-edged knife produces a wound with one end squared (blunt back) and one sharply pointed. A double-edged knife produces a spindle-shaped (fusiform) wound with both ends acute. An awl produces a circular or oval puncture wound.
Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.