There were three concerts held Hold , the first concert was from the Hungarian rock band Slager Duo , the second was performed Hold by La Familia hip-hop singer Puya and the last concert which closed Process_end the event was performed Hold by the Romanian electronic rock group Voltaj .

In addition , the killers claimed Statement to have investigated Criminal_investigation passengers ' cellphones and text messages to determine Deciding if they were involved Participation with the Gulf Cartel or not , and that they were particularly worried about buses coming in from the states of Durango and Michoacán , two strongholds of the rival La Familia and the Sinaloa Cartels .