Here are some previous r/AskHistorians posts about Narcos, perhaps they can provide you with some answers:

http://www.reddit.com/r/AskHistorians/comments/3miaad/how_accurate_is_netflixs_new_series_narcos_to/

http://www.reddit.com/r/AskHistorians/comments/3jrgfv/in_netflixs_narcos_some_of_the_cartel_bosses/