Federal police stand guard by Texas-born kingpin Edgar "La Barbie" Valdez during his presentation to the press in Mexico City on Tuesday. Valdez, who was captured on Monday by federal police, faces drug-trafficking charges in the U.S. and has been blamed for a vicious turf war that has included bodies hung from bridges and shootouts in central Mexico. Some of that violence has spilled over the border. (Associated Press)

Federal police stand guard by Texas-born kingpin Edgar "La Barbie" Valdez during his presentation to the press in Mexico City on Tuesday. Valdez, who was captured on Monday by federal police, faces drug-trafficking charges in the U.S. and has been blamed for a vicious turf war that has included bodies hung from bridges and shootouts in central Mexico. Some of that violence has spilled over the border. (Associated Press)