Unlike human fingerprints, a gun's "fingerprint" changes over time. Every shot fired slightly alters the microscopic striations in the barrel. Experts may only fire a limited number of test rounds because the fifth shot might already look different from the first. 2. Success Rates and "Expensive Failures"
To manage these vast amounts of data, law enforcement uses specialized databases and imaging systems. bullet fingerprinting
Despite its usefulness, "bullet fingerprinting" is not always a definitive proof of guilt. Several factors can complicate or even invalidate a match. 1. Barrel Evolution Unlike human fingerprints
: The National Integrated Ballistic Information Network is a federal database used to share digital images of ballistic evidence. bullet fingerprinting
