A scary El Salvador story is that of the Xtabay. It's said to be a female spirit that lives in the jungle. She sings a beautiful but hypnotic song that draws men to her. Once they are close, she either kills them or drives them insane. This story was often told to keep people, especially men, from wandering too far into the dangerous and uncharted parts of the jungle, as the unknown held such terrifying entities.
Dali's caricatures typically have a unique style. They often incorporate symbolic and abstract imagery, and play with perspectives and proportions to create a sense of mystery and oddity. Also, his use of vivid colors adds to the impact.
I'm not sure who Salvador Perez specifically is. There could be many people with this name. He might be an ordinary individual living an unassuming life, or perhaps he is a local figure known in a particular community for his work, family values, or some other aspects. Without more context, it's hard to detail his life story.
In El Salvador, there are horror stories related to the overcrowded prisons. The prisons are filled way beyond their capacity. Inmates are crammed into small cells with little access to proper healthcare or sanitation. There have been reports of violence and abuse within the prison walls as well. This not only affects the inmates but also reflects a very dark side of the country's situation.