Treviño Morales reportedly coordinated several violent attacks throughout Mexico , including the murder of 72 migrants in 2010 and the massacre of 193 people a year later in San Fernando , Tamaulipas . He is also believed to have threatened to shoot down the plane of the former President Felipe Calderón in August 2012 while on a trip to the state of Tamaulipas . Although it was not the first time Calderón received death threats from organized crime , the authorities deemed the drug lord 's threat as credible , and urged the President to cancel his trip ( though he ultimately went anyway ) . Under Treviño Morales ' leadership , Los Zetas were considered by the Drug Enforcement Administration ( DEA ) to be highly sophisticated , advanced , and one of the most dangerous criminal organizations operating in Mexico and the hemisphere . He was widely regarded as one of the most violent drug lords operating in Mexico
193 people
2011 San Fernando massacre
Miguel Treviño Morales