Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Mexican Mafia, also known as La Eme (Spanish for the letter M) is an American-originated mostly Mexican American criminal organization, and is one of the oldest and most powerful prison gangs in the United States. The Mexican Mafia was formed in the late 1950s by Chicano street gang members incarcerated at the Deuel Vocational Institution, a state prison located in Tracy, California. The foundation of the gang began with young gang members from various gangs in the greater Los Angeles area. These prisoners who laid the groundwork for the gang referred to themselves as Mexikanemi, which is translated from Nahuatl as "He Who walks with God in his heart." One of the initial founding member of the gang was Luis "Huero Buff" Flores, who was previously a member of the Hawaiian Gardens gang.