Question: Who was the Mexican medical doctor focused on, along with Tim "Nailer" Foley, in the 2015 American documentary film directed by Matthew Heineman about the Mexican Drug War?
Sentence (from "2012 Nuevo Laredo massacres"): But authors like Ioan Grillo and Sylvia Longmire note that Mexico's drug war actually began at the end of Vicente Fox's administration in 2004, when the first major battle took place in Nuevo Laredo between the Sinaloa Cartel and Los Zetas, who at that time worked as the armed wing of the Gulf Cartel.
Relevant evidence: No