On 2015 Caracas was the most dangerous or violent city of the world. With a homicide rate of 119.8 per 100,000 inhabitants. Due to all the problems in the country, corruption, insecurity, lack of goods and really bad services a huge number of people left the country. It's very hard to know the reason why this aspect of the country improve, the security was not an problem for the government, so they did not put in place any measure to improve it. I think it started improving after 2020, but I can´t make any guess about why.