By Fred Burton and Ben West On Nov. 3, a U.S. District Court in El Paso, Texas, began hearing a case concerning members of a criminal enterprise that calls itself Barrio Azteca (BA). The group members face charges including drug trafficking and distribution, extortion, money laundering and murder. The six defendants include the organization's three bosses, Benjamin Alvarez, Manuel Cardoza and Carlos Perea; a sergeant in the group, Said Francisco Herrera; a lieutenant, Eugene Mona; and an associate, Arturo Enriquez. The proceedings represent the first major trial involving BA, which operates in El Paso and West Texas, New Mexico and Arizona. The testimony is revealing much about how this El Paso-based prison gang operates, and how it interfaces with Mexican drug cartel allies that supply its drugs. Mexico's cartels are in the business of selling drugs like marijuana, cocaine and heroin in the United States.