All of the technology in the world wouldn't help with this investigation if the sniper is actually a government operative with FBI crudentials he can show everytime he gets pulled over...

*squad car pulls over white astro van*
*Officer approaches the driver's side door with firearm in hand, and orders the vehical's occupant(s) to put their hands out the window*
*Officer asks for consent to search vehical*
*Driver pulls out FBI wallet and says "I'm with the FBI, we are searching for the sniper too"*
*Police officer appologises and leaves*