Brian M. Rosenthal
Seattle Times 
August 5, 2013
Cregan Newhouse patrols the streets of Seattle, chasing license plates.
Mounted atop his Parking Enforcement minivan sit three cameras, capturing every plate he passes and instantly checking them against a database of stolen cars and unpaid tickets.
On this cloudy afternoon, he finds just two stolen cars and no chronic parking offenders, a smaller haul than usual.
But his work does not go to waste. The thousands of photos are entered into a Seattle Police Department database where, for the three months before they are destroyed, they’ll be available for use in criminal investigations.
Full story here.