G
Guns Guns Guns
Guest
Identifying the firearm used in a crime is one of the biggest challenges for criminal investigators.
But what if a shell casing picked up at a murder scene could immediately be tracked to the gun that fired it?
A technique that uses laser technology and stamps a numeric code on shell casings can do just that.
Microstamping works much like an ink stamp.
Lasers engrave a unique microscopic numeric code on the tip of a gun’s firing pin and breach face.
When the gun is fired, the pressure transfers the markings to the shell casings.
By reading the code imprinted on casings found at a crime scene, police officers can identify the gun and track it to the purchaser, even when the weapon is not recovered.
Microstamping say it offers advantages over ballistic analysis, which has been used for more than a century and depends on matching incidental tool marks on bullets and cartridge casings to show that a particular weapon was used.
Under this system, when a cartridge casing is found to match one already entered in a computer database, like the one maintained by the government’s National Integrated Ballistic Information Network, a forensic examiner must confirm the match.
http://www.nytimes.com/2012/06/13/us/code-on-shell-casings-sparks-a-gun-debate.html?pagewanted=all
But what if a shell casing picked up at a murder scene could immediately be tracked to the gun that fired it?
A technique that uses laser technology and stamps a numeric code on shell casings can do just that.
Microstamping works much like an ink stamp.
Lasers engrave a unique microscopic numeric code on the tip of a gun’s firing pin and breach face.
When the gun is fired, the pressure transfers the markings to the shell casings.
By reading the code imprinted on casings found at a crime scene, police officers can identify the gun and track it to the purchaser, even when the weapon is not recovered.
Microstamping say it offers advantages over ballistic analysis, which has been used for more than a century and depends on matching incidental tool marks on bullets and cartridge casings to show that a particular weapon was used.
Under this system, when a cartridge casing is found to match one already entered in a computer database, like the one maintained by the government’s National Integrated Ballistic Information Network, a forensic examiner must confirm the match.
http://www.nytimes.com/2012/06/13/us/code-on-shell-casings-sparks-a-gun-debate.html?pagewanted=all