What drug is being trafficked in the movie "Traffic"?

Search: traffic film

Why: 48 members of an Oaxacan family have been arrested for smuggling heroin from Mexico to Southern California.

Answer: Cocaine

Source: Wikipedia

The More You Know: On wiretaps, members of the family (the Mendoza clan) referred to the drug as "salsa," "burrito," "taco" and "shirts." They cut the black-tar heroin with lactose using a coffee grinder.