On 17 June 2011 the Federal Police captured Édgar Huerta Montiel alias '' El Wache '' , the major perpetrator of the mass murder . His contention was that the immigrants were killed because Los Zetas believed that they were going to be recruited by the Gulf Cartel , a rival gang . He also confessed that other bodies were put in mass graves . The immigrants were abducted from several buses , the same way others were abducted for the 2011 San Fernando massacre . The police chief that was in charge of leading the investigation of the massacre was killed by suspected members of a drug cartel
2011 San Fernando massacre
2011 San Fernando massacre
2010 San Fernando massacre