I don’t know the history, maybe guns were confiscated but Venezuela and Caracas are certainly known for their high murder rate, I doubt if all of this is done with knives.
https://en.wikipedia.org/wiki/Crime_in_Venezuela
The people willingly turned them in when a defacto ban was passed in 2012. One Venezuelan i know has told me that it is not “in the culture” to keep guns in the home. In that case, they need to save themselves with anything they can get their hands on.