That's two in one month and it makes an even dozen.
"Eduardo Arellano Felix is to serve 15 years in jail, after pleading guilty to charges of money laundering," says the BBC. Though I don't know if this should really count since he's been in jail since 2008, and his nickname, "The Doctor," is kinda lame. But I'm still chalking him up because, well, he was a kingpin (or at least the accountant for one).
Check out the others.
Eduardo was the last of four brothers who ran the Mexican drug cartel known as the Arellano-Felix Organization. With all these kingpins gone, we can look back to the turning point in the drug war. Though today it's hard to conceive of how violent Mexico once was, back before we won the war on drugs.