Sorry to be paranoid, but if the technology exists to make scratches on bullets that are exact duplicates for use in testing, does not the ability also exist to produce a bullet supposedly from a shooting victim that’s an exact match to one fired from your gun?

Harold Reed
Milledgeville, Ga.

Fingerprints and DNA are useful in solving crimes because they are both unique and permanent. The “fingerprints” that a gun puts on the cartridge case and bullet may be unique, but they are not permanent. Spending 2 minutes at the chamber and muzzle with a small file will completely change the “fingerprint” of the case and the bullet.

Fred Jeffers
Escondido, Calif.