In a large, run-down building in the center of Guatemala City, I meet a young man we’ll call José. He is only eighteen, with a baby face and a mop of fluffy dark hair. But he has the hard, tired eyes of someone decades older. He already has several years under his belt working as a hit man for a local gang. It may be more accurate to say hit boy than hit man, because when he began this career he was only eight-years-old. Another gang had murdered his father, stabbing him in the street and then coming back to finish him off when they learned that the initial attack had failed to kill him. José started his criminal life by killing the man who had murdered his dad. “I enjoyed it,” he says, his face expressionless.