Chile got it's shit together and as I've said before, as soon as it completes universal health care and education the HDI is going to rival many EU states (I think it might already be, can't remember at the too if my head). Chile has taken Argentina's place as safest/most developing country in South America.
Regarding murder rates, I have two points: has La Nacion been forced to use INDEC/government stats? Secondly, I can only speak for myself, but my fear and anxiety is over robbings, assault and theft.
What's happening in Venezuela regarding the murder rates isn't related to the CIA. Do they want to see Maduro gone? Yes. Do I want to see him gone? Yes (but because he is a cancer to the word socialism and an authoritarian, but I think Venezuelans need to do it themselves).
I think people give the CIA too much credit. How can the same group so many people credit assassinations, regime changes and undermining to not even see threats to our own nation. This isn't to say they haven't and don't do the things mentioned, but I simply don't get the impression they want to be/are behind so many of the issues South American states face today.