Matt Lauria, who plays FBI Agent Matthew Pratt in this episode, goes on to star in CSI's sequel series CSI: Vegas as Joshua Folsom.
The 5.7X28mm ammunition mentioned in the episode is a caliber created by Fabrique Nationale d'Armes de Guerre-Herstal (FN Herstal) for the FN Five-seveN pistol and the FN P90 personal defense weapon. The ammunition was illegal in the United States due to its armor piercing capabilities due to use in military applications and a civilian version of the ammunition was created that didn't have this capability. The FN Five-seveN was also illegal until the expiration of the 1994 Brady Bill ban on high capacity magazines due to the pistol being only available with 20 round magazines. The FN P90 was also illegal due to the 1994 Brady Bill Assault Weapons ban. Both the FN Five-seveN and FN P90 became legal for civilian ownership upon the expiration of the 1994 Brady Bill in 2004 when the bill was not renewed.