Deliberate mistake: The way diplomatic immunity is depicted in the movie is extremely inaccurate. While technically a sufficiently ranking diplomat could perform the acts shown in the movie without being subject to arrest, their home government would be requested to turn the diplomats over for trial, or the diplomat would be declared persona non grata and expelled from the country. A drug smuggling ring and murdering multiple policemen is far, far more serious than actual crimes that diplomats have been expelled (or handed over for trial) for in the real world. Additionally, the consul general and his officers would not be considered diplomats. They would only have limited consular immunity with regards to "official acts" in the course of consular business.
Trivia: The first time we see Riggs in his trailer, there's an advert for some new aftershave called "Hero" on the TV. During the attack on his trailer later, there's a close-up shot of a bottle of aftershave being destroyed - freeze-frame it and you'll see the brand: "Hero" again.
Add timeJon Sandys
Arjen Rudd: Certain policemen in this city have become an intolerable nuisance. They are obviously onto us again. How do you propose to handle the situation?
Pieter Vorstedt: Warn them off. It's my experience that a scared cop is more useful than a dead one.
Arjen Rudd: A warning... Is that not a bit tame?
Pieter Vorstedt: Depends how you do it.