Yes, it’s true, gang members use the same powerful social mediums to communicate with one another just as we do.

Like many of you, I have seized and analyzed my fair share of digital devices. But by far, the ones that have proven themselves, time and again, to be a treasure trove of evidence and criminal intelligence has been those used by gang members. In their online chat sessions, gang members discuss activities that include the planning and execution of crimes, drug cultivation and distribution, and the buying and selling of weapons, to name just a few of the things I have seen. The social networking Web sites they visit glorify gang culture or promote their individual street gangs. These same gang members, who won't say a word to you when questioned, will have folder after folder full of digital photos documenting their gang life, everything from gang posturing to drug use and other crimes. Throughout all of their use of digital devices, they nearly always use their known gang monikers as their online identifiers.

From: Don’t Fool Yourself: Gangs Blog and Tweet Like We Do by Andy Spruill