Scratching the Surface

Scratching the Surface refers to episode 33 of the Season 7 of the television series Forensic Files which was broadcast for the first time on May 24, 2003.

Plot summary
Forensic scientists work with the only clue recovered from an October 1993 multiple-victim shooting at Aircraft Modular Products in Miami, Florida: a 12-gauge shotgun. Scientists use unique methods to lift the serial number from the weapon in order to trace it to its owner, eventually discovering that disgruntled employee Gerardo Manso was the shooter.