Originally Posted by NewChief
I also think that Gus must have a cartel informant in his organization due to the way they knew how Gus's shipments work. Maybe they just know from their past affiliation with him, though.
i thought that too, you never know though. if their own shipments to the US are becoming fewer because great meth is now available where it wasn't before, they could put two and two together pretty easily. doesn't explain how they knew what truck it was in and more specifically which container though.