We set off from Radisson Blu Resort Maldives, a dot of an island in a small archipelago in the South Ari Atoll, around 40 minutes by seaplane from the Maldives’ capital Malé.

Fiji prosecutors allege that two of the men on trial, David Heritage and Justin Ho, arranged for the methamphetamine to be shipped into the country. Along with seven other co-accused, the prosecution ...