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Kodiak_85 t1_iu1k4ii wrote

Reply to comment by 1up in Deputy arrested for illegally selling guns used in Roxborough HS shooting by dc122186

The guns were tested for ballistics and matched spent (fired) rounds found at the scene of the shooting. Every gun leaves a unique imprint on every bullet it fires. Similar to a fingerprint.

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Sage2050 t1_iu22eea wrote

That's a lot less reliable in real life than it is on TV. They caught 3 of the 4 shooters, one of them probably had the guns.

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