And to whoever was talking about bloods/crips/mexican gang thing is actually kind of dead on. Latino gangs, including Mexican gangs have been taking over areas traditionally controlled by African American gangs. In fact, Latinos overall are taking over areas that used to be overwhelmingly black overall, not just in the criminal world. There is A LOT of racial tension in LA over this. It sucks too, because both groups have the same mountain to climb if they are fighting over who controls a street filled with tattered shacks in Compton.
The thing about the whole bloods/crips thing is that I'm pretty sure that the overall feud is over. Also, its not like there is one unified "bloods" and "crips." Most of those gangs are split up into sets or cliques in local areas, often times relating to a street. The people in the cliques are mostly concerned with local issues and rivalries with other local sets that often relate to local interactions. Often times two crews under the crip umbrella will have beef with each other, it may not have always been this way, but there is no real central control these days. Another interesting fact: there are FAR more crips than bloods.