Forensic Ballistics
The Study of Firearms, Projectiles, and Wound Dynamics
1. What is Forensic Ballistics?
Forensic ballistics is the scientific application of ballistics to criminal investigations. It involves analyzing firearms, ammunition, and the physical effects caused by projectiles to reconstruct events, identify weapons, and link evidence to specific scenes or individuals.
2. The Four Stages of Ballistics
| Stage | Focus |
|---|---|
| Internal | Events inside the firearm (ignition, barrel travel). |
| Transition | The brief phase is the projectile’s exit from the muzzle. |
| External | The projectile’s flight through the air (trajectory). |
| Terminal | The impact and effect on the target (including wound ballistics). |
3. Forensic High-Yield Pearls
- Ballistic Fingerprints: Firearms leave unique microscopic striations (marks) on fired bullets and cartridge cases due to imperfections in the barrel or firing mechanism.
- Reconstruction: Experts analyze entry/exit wounds, projectile paths, and gunshot residue (GSR) to determine distance, angle, and the sequence of shots.
- Medical Scope: Forensic ballistics is vital for the medical examiner in distinguishing suicide from homicide and accidental discharge, often through the examination of range-of-fire indicators (e.g., tattooing, blackening, singeing).