Was Omar Suarez a police informant?

Answer 1

It's a good question. The movie ends with the question pretty much unresolved. What evidence is there that Omar is in fact, as Lopez put it, "a stooly"? We have only the word of Sosa's associate Alberto as evidence that Omar's is a police informant. It was on Alberto's word alone that Sosa gave the order to have Omar killed. Does the movie offer any clues as to who Omar really is? Not very many. Omar is, apparently, the number two man in Lopez's criminal organization. This would be pretty hard, although not impossible, for a police informant to achieve. The first job that Omar assigned to Tony, the drug deal gone bad at the Sun Ray Motel, may have been a trap set up by Omar. If it was a trap then clearly Omar did not expect Tony to survive the encounter, and this would be further evidence that Omar was not a police informant, but was instead a criminal out to eliminate his new rival.

It is clear that Lopez did not think that Omar was a police informant. Quote: "You want me to believe that Omar was a stooly because Sosa said so? You bought that line?". This would lead one further to believe that Omar was a "legit" criminal.

In my opinion, with the exception of the claim from Alberto that Omar was a police informant, all other evidence in the movie, albeit circumstantial, would suggest that Omar Suarez was a legit member of Lopez's criminal organization just as he appeared to be.