How are bullets and firearms compared in CSI?

How are bullets and firearms compared in CSI?

Richard Saferstein (Former Chief Forensic Scientist) gives expert video advice on: How does the study of firearms help in CSI?; How does a gun work?; How are firearms and ammunition collected in CSI? and more...

That's easy. There's only one major testing method, and that is the comparative microscope. Physically taking a bullet and comparing it to another bullet, and looking to see whether the stria, or rifling markings, match up underneath the comparison microscope. This is an endeavor that can only be undertaken by the trained eyes of a firearm examiner.