cartridge, linking the most common type of ballistic evidence cartridges with the firearm then getting into the tracing system will solve a lot of crimes. >> now, california has gone ahead and it was hard fought in california, but governor schwarzenegger did sign it into law, 2007. there was some delay in the implementation. you had a part in encouraging california to write the law. how did you get involved with it and what was the fight like? >> i was involved, as people may remember, there was a sniper here in d.c. in 2003. i lived in the neighborhood where it was active. the lawmakers found the cartridges and we couldn't identify the gun. once we found john muhammed from was washington, we could do all sorts of things. the cartridge we kept on finding, it was a tease. we couldn't do anything. after that i said we need to learn more about this, these more evidence from the cartridges. we found this small company in new hampshire making this great microstamp technology and said,