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Criminals are not noted for cleaning up after themselves when they skedaddle from a crime scene. They take their guns but leave behind spent cartridge casings and bullets. “The movies always show ...

PUEBLO — Shots are fired. No suspect is immediately identified. But, if one shell casing is found, police have a better chance at solving the crime. Take for instance a 2017 homicide case in Pueblo.

A computer technology that can match the unique marks a gun makes on cartridge casings is helping detectives in Fairfax County, Virginia, to track down people suspected of violent crimes more quickly.

Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X A television in Baltimore Circuit Court showed a magnified picture of spent cartridge casings ...