Ruben Zuno-Arce was a central figure in two criminal trials in the U.S., a key subject of several episodes of Narcos: Mexico, and is vilified in The Last Narc.  

This episode takes a look at who Mr. Zuno was, his history and background, and analyzes the two criminal trials and the witnesses against Mr. Zuno.  This episode leads into next week's second part which will detail why Mr. Zuno's case is significant and what it can tell us about the government's investigations and prosecutions.