He Guarded Haiti’s Slain President. And He Was a Suspect in a Drug Inquiry.

Officials are examining whether President Jovenel Moïse’s killing was tied to the drug trade. The man in charge of his safety was a suspect in a major trafficking case, they say.

PORT-AU-PRINCE, Haiti — The commander in charge of guarding the Haitian president’s home quickly became a suspect in the assassination of President Jovenel Moïse last month when his security team inexplicably melted away, enabling hit men to enter the residence with little resistance and kill the president in his own bedroom. But current and former officials say that the commander, Dimitri Hérard, was already a suspect in a separate case that the United States Drug Enforcement Administration has pursued for years: the disappearance of hundreds, if not thousands, of pounds of cocaine and heroin that were whisked away by corrupt officials only hours before law enforcement agents showed up to seize them. Now, some international officials assisting with the investigation into the president’s assassination say they are examining whether those criminal networks help explain the killing. Haitian officials, including the country’s prime minister, have acknowledged that the official explanation presented in the days after the assassination — that Mr. Moïse was gunned down in an elaborate plot to seize political office — does not entirely add up, and that the true motive behind the murder has not been uncovered.