Castillo "passes out" before Dexter even pushes the syringe plunger.
Nina claims to be from Cuba, but her accent is pure Mexican, even using Mexican idioms and slang that would be foreign a Cuban.
Nina complains that the coyote has not yet brought her fiancé. The term coyote is very out of place in Miami, particularly since illegal immigration does not come across the ocean by way of these illegal smugglers from Mexico. On the whole, Mexicans are very small minority among Hispanics in South Florida.
If Masuka is a hypochondriac and so afraid of catching leptospirosis from rats, why didn't he bother to wear a medical mask while rummaging through a rat's nest?