A friend of Muñoz says the film industry veteran drove out to photograph areas for season 4 scouting when he was last seen alive.
More broadly, though, Narcos was reportedly set to focus season four on Mexico's infamous Juarez cartel - and the fact that Munoz Portal was killed in that area and found "bullet-riddled" in his vehicle may speak for itself as far as who's responsible for the violence. Police are now investigating the circumstances of Portal's death.
El País reported that authorities found Muñoz's compact auto on a dirt road in San Bartolo Actopan in the muciplaity of Temascalapa in the State of Mexico.
The upcoming season of "Narcos" was set to film in Mexico, exploring the origins of the infamous Juarez cartel, as opposed to Columbia, where the previous seasons were shot.
His auto was found in the San Bartolo Actopan area. That entity, the most populated of the country, is the one that has more homicides.
The Spanish daily reported that there are no witnesses and that a friend of the victim thinks it's possible that "the presence of a foreigner with a camera was uncomfortable for the inhabitants, frightened by the insecurity of the region".
Netflix said in a statement, "We are aware of the passing of Carlos Munoz Portal, a well-respected scout, and send our condolences to his family".
El País de España reported that it was unclear if Portal was fleeing to Hidalgo or from Hidalgo - which has the highest murder rate in Mexico. "The facts surrounding his death are still unknown as authorities continue to investigate what happened".