On the first day of training to become a hitman for the Jalisco Cartel New Generation, Francisco learned that the only way to escape from the camp was to leave “in a body bag.” In three months he’d learn much more: how to handle short and long weapons, ambush enemies, respect the rules, not be a gossiper and how to kill. “You see how they kill people, taste human flesh, you live in terror,” he says. Francisco — the name he has given to protect hi…