Sept. 1, 2010: Police stood guard by a truck containing some of the bodies of immigrants killed by members of the Zetas drug cartel in Tamaulipas state.
Jorge Dan/Xinhua /Landov
October 9, 2012 Heriberto Lazcano, "The Executioner," was reportedly killed Sunday in a battle with Mexican marines. Salvador Alfonso Martinez Escobedo, known as "Squirrel," was captured hours earlier.
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