As a bullet travels through a gun barrel, it is gripped by —spiral grooves machined into the metal to make the projectile spin for stability.
: The Integrated Ballistic Identification System (IBIS) is the hardware and software used to capture these high-resolution 3D images.
: The pin strikes the primer at the back of the casing, leaving a unique indentation. bullet fingerprinting
: When the gun fires, the casing is forced backward against the breech face, transferring its texture to the metal.
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 As a bullet travels through a gun barrel,
When a gun is fired, several mechanical actions leave distinct impressions on the ammunition. These marks are primarily categorized into two types: 1. Striation Marks (on the bullet)
: The National Integrated Ballistic Information Network is a federal database used to share digital images of ballistic evidence. : When the gun fires, the casing is
: These systems can often provide investigative leads within 24 to 48 hours by flagging potential matches across different crime scenes. Limitations and Controversies