[Maceman]

Every firearm leaves it own fingerprint on ever bullet fired thru it. The rifling makes distinct marks in the laed of every round fired. They know it's the same gun.

Gun toting freepers tell me that it is easy to alter the weaopn to change the distinctivb fingerprint. Do we know for a fact that they all have the same fingerprint?

[ASA Vet]

Fairfax County Police Chief Manger said,

"Ballistic evidence has conclusively linked this case to the other murders in the area."

[KneelBeforeZod]

it is easy to change the 'fingerprint' of a gun if you know how. But then you still have the new 'fingerprint' on your gun. So unless you throw it away (or maybe add a new barrel then throw that out) it doesn't help much.

And it is just as easy for a forensics expert to CONVINCE A JURY (which is the important thing) that this bullet came from this gun because you can see it was altered in this way...