The New York Times, April 2, 2010 by Richard C. Paddock
http://www.nytimes.com/2010/04/02/us/02sfbriefs.html
“A number of these technologies can be additional useful tools for law enforcement, but none of them is a panacea,” said David Onek, a senior fellow at the Berkeley Center for Criminal Justice and a member of the San Francisco Police Commission. “We need to look at how effective each is and balance that against legitimate civil liberties concerns.”