Trivia: At the fairground, when Rane and the two terrorists walk away as Cutter is arriving, there's a white Honda Civic seen. It's license plate reads "outatime", the same as the plate on the DeLorean in Back to the Future.
Trivia: FBI Agent Dwight Henderson is portrayed by Robert Hooks, the father of director Kevin Hooks.
Answer: I just rewatched it this morning. When Rane is trying to persuade Sheriff Biggs that he means business, one body (presumably The Captain) is thrown out of the plane. Just before the passengers are released, we see a quick shot of yo ambulances. One has 3 full occupied body bags in it. Therefore, it's implied the other two are in the other ambulance. This takes place before the FBI guy gets there. The fact that he tells Rane, those guys you killed were my friends" means that at some point they were identified by name. He could've found out numerous ways (Washington told him, briefing, the paramedics, Biggs, etc).