Mexican Army soldiers guard Irasema Lopez Garza, partner of Carlos Oliva Castillo, aka "La Rana", alleged leader of the Zetas in the states of Coahuila, Nuevo Leon y Tamaulipas, in Mexico City, in ... more 

Mexican Army soldiers guard Irasema Lopez Garza, partner of Carlos Oliva Castillo, aka "La Rana", alleged leader of the Zetas in the states of Coahuila, Nuevo Leon y Tamaulipas, in Mexico City, in 2011. The high mortality rate in Mexico's drug war has seen women progress quickly in the shadowy underworld of the cartels and they are increasingly taking on key management roles, a new book says less