Bullet Fingerprinting [Certified]

: The pin strikes the primer at the back of the casing, leaving a unique indentation.

: Microscopic flaws in the manufacturing process or wear and tear from use create a "signature" unique to that specific barrel. 2. Impression Marks (on the casing) bullet fingerprinting

: 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

Bullet fingerprinting, more formally known as , is a forensic technique used to match a fired bullet or shell casing to a specific firearm. The "fingerprint" consists of unique, microscopic marks left on the ammunition by the gun's internal components during the firing process. While often portrayed as a flawless investigative tool in television dramas, the reality of its scientific reliability is a subject of significant debate within the forensic community. How It Works: The Mechanical Fingerprint Impression Marks (on the casing) : The Integrated

: These systems can often provide investigative leads within 24 to 48 hours by flagging potential matches across different crime scenes. Limitations and Controversies

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 raised parts of the rifling (lands) and the cut-out parts (grooves) leave parallel scratches on the bullet.