[1] His new magazine was strictly crime-related, and it was known for criticizing the Mexican government for the high homicides rates in the state of Chihuahua, particularly the executions between rival drug gangs.

[5] Prior to his assassination, Perea Quintanilla wrote in his last column that Dos Caras, Una Verdad had several video clips, photos, and documents sufficiently in detail to supposedly inculpate various politicians and officials in the government, including the then-governor of Chihuahua, José Reyes Baeza Terrazas.

[12] The Mexican multimedia conglomerate TV Azteca received a video from an anonymous user on 12 October 2012 showing two naked men, with clear signs of having undergone torture, confessing their involvement in the assassination of Perea Quintanilla.

[5][13] The alleged killers, Leopoldo Rodríguez García and Armando Duarte Escobedo, were interrogated by an unseen man heard in the background of the video clip, and admitted that they had killed Perea Quintanilla on orders of three drug lords of the Juárez Cartel, a Mexican drug trafficking organization based in the northern state of Chihuahua.

[15] After answering some questions, the man confessed that his sister Patricia González, the state attorney general, had ordered the execution of Perea Quintanilla and Armando Rodríguez Carreón, another journalist.