Forensic scientists are getting hands-on with guns and bullets inside the firearms section at the Bexar County Crime Lab.
The firearms lab gets thousands of guns and ammunition each year to assist criminal investigations.
“Every firearm leaves its own pattern of tool marks, and this pattern is different at the microscopic level,” said Holli Worden, a forensic scientist at the Bexar County Crime Lab. “We’re looking at two elements. One would be the fired cartridge case, and one would be the bullet. The bullet itself is going to pass through the barrel. Every barrel is going to leave its own pattern of tool marks on it.
Some of the tools used during their investigation include a large water tank used by scientists to shoot and retrieve bullets. The lab also has an ammunition and firearms reference collection room. It’s essentially a large database used for comparison. On the day KSAT visited the lab, Worden worked on a case with more than 120 fired cartridges from four shootings. She had to compare every one of these bullets and calibers.
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