Orange County student told to take off sweatshirt with 'gang ties
Gangs and Sports Attire - Gang Enforcement
Alberta government invests $4.4M to get tough with gangs, gun
The NYPD's Gang Policing Looks a Lot Like Stop-and-Frisk - Bloomberg
Gang associate arrested in Surrey on Canada-wide warrant
Arrests show patterns of gang activity in Greater Waco
In a First for the Nation, Portland Police End Gang List to
Gang Task Force Goes Online
What gang/gangs wear purple and yellow? - Quora
Gang Signs: A Lexicon of Violence