so ive been watching tv shows were bullets could be traced back to the exact gun used in shooting or crime. How does that work wouldn’t they need the gun that was used tho to track. or could they proceed with just a bullet
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They can’t look at a bullet and see a serial number or something on it of the gun that fired it, but what they can do is compare the markings on a bullet found at a crime scene and one fired from a suspected murder weapon to see if there’s a match. But they need to have the suspected gun present to make that comparison. So the police might have a suspect, who owns a gun of the same type that the murder was committed with (same kind of bullets) so they get a warrant to test that suspect’s gun to see if it matches the crime scene
Or they can look at a database of bullets that have been analyzed from prior crimes and say with some certainty that this new bullet was fired by the same gun used in X crime all those years ago, or whatever.
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