Analysis-As Haiti investigation stalls, U.S. probes president's killing

FILE PHOTO: A picture of the late Haitian President Jovenel Moise hangs on a wall before a news conference by interim Prime Minister Claude Joseph at his house, almost a week after his assassination, in Port-au-Prince, Haiti July 13, 2021. REUTERS/Ricardo Arduengo/File Photo

PORT-AU-PRINCE (Reuters) - The United States is becoming increasingly involved in the investigation of Haitian President Jovenel Moise's murder, with key suspects facing the prospect of trial in U.S. courts, as a probe by the Caribbean nation's authorities stalls.

Congress last week ordered the U.S. State Department to produce a report about the July 7 assassination, which deepened a political power vacuum in the Western hemisphere's poorest country and has emboldened the powerful gangs who serve as de facto authorities in parts of Haiti.