It might be a bit more serious, if the FBI is getting involved as they are. Think less school yard bully gangs (the type who just spray paint everywhere and claim to beat you up if you try to leave), and more Mafia type gangs where they specialize more in organized crime and the police can't even get into without blazing up a major gunfight.
Or everyone could just be in an uproar about graffiti on the walls, Iunno.