Hi Ivy, thanks for your post. These are actually the only 5 organized crime crews that are Mexican-American. Those you listed are actually gangs, especially the Border Brothers who started in Oakland and are rivals with the Nortenos. Very vicious gangs yet still gangs.
This is where we get into the often murky distinction between organized crime and gangs. A group like La Eme is first and foremost a prison gang. Yes, their influence extends to the streets of Southern California but so do that of many other prison gangs. A Mexican prison gang not among those five you listed could just as easily be charged with a RICO conspiracy as La Eme, Nuestra Familia, etc. So I'm not sure what makes those particular five "organized crime" while the others aren't.
Check out the link below. You will see Barrio Azteca, La Eme, Mexikamemi, Nuestra Familia, and the Texas Syndicate all listed as
prison gangs.
http://www.justice.gov/criminal/ocgs/gangs/prison.html
