Comparing ballistic wounds with experiments on body simulator

Area of Science:

• Forensic Science
• Ballistics
• Biomechanical Engineering

Background:

• Accidental shootings require precise forensic analysis to determine event circumstances.
• Distinguishing between different projectile impact energies is crucial in forensic investigations.
• The absence of the projectile complicates the reconstruction of accidental shooting events.

Purpose of the Study:

• To demonstrate the utility of ballistic experiments on body simulators in forensic investigations.
• To differentiate between two suspected accidental shooting scenarios based on impact energy.
• To assess the compatibility of simulated ballistic wounds with the victim's injuries.

Main Methods:

• Conducted ballistic tests using body simulators with varying impact energies (1200J and 2400J).
• Simulated bullet expansion states and resulting ballistic wounds for each scenario.
• Measured muzzle velocity and computed impact velocity based on known hunter positions.
• Utilized reloading cartridges to accurately reproduce projectile velocities.
• Employed three different body simulation methods to evaluate process accuracy.

Main Results:

• Ballistic simulations successfully discriminated between the two investigated cases due to significant differences in impact energy.
• The study determined that body simulators do not require high accuracy in this specific velocity/energy range to reproduce bullet expansion.
• Only one of the simulated scenarios was compatible with the victim's observed ballistic wounds.
• The incompatible scenario predicted a different wound shape due to bullet expansion.

Conclusions:

• Ballistic experiments on body simulators provide critical information for forensic science, particularly in cases lacking physical evidence.
• The findings confirm the effectiveness of body simulators in distinguishing between different projectile impact scenarios.
• This methodology can reliably determine the source of a projectile in accidental shooting cases by matching simulated wound characteristics to actual injuries.