#DidYouKnow every gun has its own “fingerprint”? The unique marks are left behind on each shell casing. Thanks to the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), a national database exists that enables OCSO and other law enforcement agencies to compare shell casings connected to different crimes. It’s known as the National Integrated Ballistic Information Network, commonly called NIBIN. When casing images are added to the network, a possible match or “hit” means the gun that