Originally Posted by SaddleSarge
Basic police work has to still be done.
Correct. Fourteen years assigned to homicide and the vast majority of cases solved involved hours and hours, days and days (sometimes months and years) of plain old detective work. Talking to people, delving into the victim's history and connections, his/her movements, etc. Sure, it is great to find/recover the weapon but there still must be a nexus established between that weapon and the recovered bullet and the suspect or defendant. Stamping bullets or casings may be a piece of evidence but it will still be a reach to make the necessary connections. Just because someone bought a box of ammo last year and one of those bullets was used in a crime this year or any subsequent year will still result in a looooong way to arrest and conviction without supporting evidence and/or testimony.