 Nuevo Laredo en Vivo had become a site where people could announce to others about the dangers of drug violence and inform police.Macías was collaborating with others on the Nuevo Laredo en Vivo site, and after her murder, at least three others who have not been identified as journalists have been killed by Los Zetas drug cartel in retaliation for postings to the same social media site.Marisol Macías Castañeda at one time worked for "El Mañana" newspaper.