From Mountain of CCTV Footage, Pay Dirt: 2 Arrests in Spy Poisoning The poisoning of a former Russian spy led to a landmark test of an investigative technique Britain has pioneered: accumulating mounds of visual data and sifting through it. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Italian Police Break Up Ring That Illegally Dug Up Ancient ArtifactsWives and Children of ISIS, Unwanted Back Home, Are Warehoused in SyriaMax Fuchs, G.I. Cantor in Historic Battlefield Service, Is Dead at 96Blind and Graying, Dragon Boat Rowers ‘Challenge the Impossible’Al Qaeda-Backed Terrorist Group Has a New Target: Plastic BagsInternet Renegade Kim Dotcom Loses Appeal on Extradition to U.S.