Since there's only 3 cops and one police car he won't have any problems if he flew a MS13 banner behind his plane.
San Salvador (MYSM) is where he's going.
Its like any other out-island. Nassau approach brings you in and when you descend to the airport its all basically VFR rules, see-and-avoid. Cancel with them or on the ground with Nassau RDO. Or on your way out pick up your clearance in the air. Airport services, I don't know how they changed, its been a good 8 years since I've been there. File your outbound flight plan before you go in case you can't get Nassau RDO on the ground, or just pick it up in the air. They might have someone on the ground there that will call it in for you. Just been a long time since I've been there, don't want to steer you wrong.