Click on the link below to read the article from the New York Times:
U.S. | August 16, 2011
Sending the Police Before There's a Crime
By ERICA GOODE
In California, "predictive policing" deploys officers in places where crimes are likely to occur in the future.
Comment: On its face, this article is a little thin on providing technical details that relate what they are talking about is a geospatial system based by algorithmns. To get to that meat, click on the "unusual experiment" link in the article for a quick loading nine-slide Power Point.