In July, a group of men stormed the presidential compound in Haiti and assassinated the country’s president, Jovenel Moïse. Months later, the case remains unresolved. Investigating the killing, the Times journalist Maria Abi-Habib found that Mr. Moïse had begun compiling a list of powerful Haitian businessmen and political figures involved in an intricate drug trafficking network. Guest: Maria Abi-Habib, bureau chief for Mexico, Central America and the Caribbean for The New York Times.