Snoop software makes surveillance a cinch / New Scientist, 23 August 2008
http://technology.newscientist.com/channel/tech/dn14591-snoop-software-makes-surveillance-a-cinch.html?feedId=online-news_rss20
"This data allows investigators to identify suspects, examine their contacts, establish relationships between conspirators and place them in a specific location at a certain time."