Mexican Navy marines escort Jorge Eduardo Costilla Sanchez, aka "El Coss," as he is shown to the press at the Mexican Navy's Center for Advanced Naval Studies in Mexico City,Thursday, Sept. 13, 2012. Costilla is believed to be the alleged leader of the Gulf drug cartel. One of Mexico's most-wanted men, the 41-year-old is charged in the U.S. with drug-trafficking and threatening U.S. law enforcement officials. U.S. authorities offered $5 million for information leading to his arrest. (AP Photo/Dario Lopez-Mills)

Associated Press
Mexican Navy marines escort Jorge Eduardo Costilla Sanchez, aka "El Coss," as he is shown to the press at the Mexican Navy's Center for Advanced Naval Studies in Mexico City,Thursday, Sept. 13, 2012. Costilla is believed to be the alleged leader of the Gulf drug cartel. One of Mexico's most-wanted men, the 41-year-old is charged in the U.S. with drug-trafficking and threatening U.S. law enforcement officials. U.S. authorities offered $5 million for information leading to his arrest.  (AP Photo/Dario Lopez-Mills)
Mexican Navy marines escort Jorge Eduardo Costilla Sanchez, aka "El Coss," as he is shown to the press at the Mexican Navy's Center for Advanced Naval Studies in Mexico City,Thursday, Sept. 13, 2012. Costilla is believed to be the alleged leader of the Gulf drug cartel. One of Mexico's most-wanted men, the 41-year-old is charged in the U.S. with drug-trafficking and threatening U.S. law enforcement officials. U.S. authorities offered $5 million for information leading to his arrest. (AP Photo/Dario Lopez-Mills)
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