Pedant check (sorry) - Mexico is in North America, not SA as mentioned (or indeed Central America).
The country is a lot more advanced than many realize, and it is a truism that the drug money enables huge development of whatever technology is deemed beneficial to the business. Armed drones are now within reach of anyone with a few grand a bit of know-how. These will quickly become more advanced and capable. In the bigger picture, the day of the manned fighter is approaching the sunset phase - the decision maker does not need to be in the aircraft anymore. The more worrying aspect from my point of view is the huge amount of research and development being done into an AI solution, where drones make decision for themselves based on a rule-decision matrix. This will include kill/no-kill decisons. Drug Lords with billions of dollars will be only too happy to have some airborne robot killers protecting their investments.