The Mexican Mafia - which did not originate in Mexico - was founded in 1957 by 13 Latino gang members at the Deuvel Vocational Institution, a California youth detention center. The Kings County District Attorney's Office also declined comment. Attorney's Office in Los Angeles, declined comment on Roman's death. His daughter was sentenced in 2015 to 15 years in federal prison, culminating an investigation that federal authorities dubbed 'Operation Roman Empire.' That included collecting 'tax payments' from Latino gangs under his control, prosecutors said. She would then pass them to members of the Harpys street gang, who prosecutors said oversaw crimes both in their own territory and the broader area Roman controlled. Investigators said Vianna Roman used coded language to give information to her father and to get instructions from him during visits at the prison in far northwest California. They alleged that Roman was passing orders to his daughter and son-in-law, who in turn directed gang members. Roman wasn't charged, but prosecutors said he was controlling a dozen gangs, including one that extorted vendors at a swap meet and another that targeted students at the University of Southern California in drug trafficking, killings and robberies. Danny Roman, who the federal government once accused of controlling several South Los Angeles street gangs from prison, was killed by two inmates Wednesday at the Substance Abuse Treatment Facility and State Prison (pictured) in Corcoran, California