The coordinated efforts to track and capture Zeta leader Trevino had started under Calderon and continued, said George Grayson, a College of William & Mary professor who has written extensively on the Gulf and Zetas cartels.
"Enrique Pena Nieto would really like to not be going after capos," Grayson said Sunday. "He wants to change the agenda. He doesn't want the headlines to be about capos. But the situation in Morelos and Michoacan (states), and now the takedowns in the north have kept the capos on the front pages."