I finally finished reading parts 2 and 3 of this just now. Honestly, this story is horrifying. I'm not sure if I want to read Webb's article or not. But what I think is important to take from this is two key points:
1. That various parts of the US government have a seriously problematic disregard of the Constitution. And not just in terms of the information gathering that's always on the headlines today, but in much more visceral and violent terms as well.
2. Mexico's recent history is horribly intertwined with drugs, and remains so to this today. I'm no expert on this, so I don't know if the corruption has gotten better or worse since the events of Operation Leyenda. But it's still there. Reform is absolutely necessary there (but I don't know how to approach it, or if the US government should make actions there).