SNIPPET: "Chicago gangs are still spray-painting their graffiti on alley walls, train cars and viaducts — but they’re also using their smart phones and computers for “cyber-tagging,” according to the Chicago Crime Commission, which released an updated book on the city’s street gangs Thursday. They’re provoking their rivals with Internet graffiti and using social media to keep in touch with their associates, according to the commission. “They’re tagging websites with information that is provocative and incites violence,” said Jody Weis, former Chicago Police superintendent and president of the commission." SNIPPET: "Web chatter is a valuable tool for law enforcement officials...