MEXICO CITY - A split in the leadership of Mexico's violent Zetas cartel has led to the rise of Miguel Angel Trevino Morales, a man so feared that one rival has called for a grand alliance to confront the gang chief blamed for a new round of bloodshed in the country's once relatively tranquil central states.
Trevino, a former cartel enforcer who apparently has seized leadership of the gang from Zetas founder Heriberto Lazcano Lazcano, is described by lawmen and competing drug capos as a brutal assassin who favors getting rid of foes by stuffing them into oil drums, dousing them with gasoline and setting them on fire, a practice known as a guiso, or cookout.
Law enforcement officials confirm that Trevino appears to have taken effective control of the Zetas, the hemisphere's most violent criminal organization, which has been blamed for a large share of the tens of thousands of deaths in Mexico's war on drugs, though other gangs have also repeatedly committed mass slayings.
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"There was a lot of talk that he was pushing really hard on Lazcano Lazcano and was basically taking over the Zetas, because he had the personality. He was the guy who was out there basically fighting in the streets with the troops," said Jere Miles, a Zetas expert and U.S. Immigration and Customs Enforcement special agent who was posted in Mexico until last year.
"Lazcano Lazcano, at the beginning he was kind of happy just to sit back and let Trevino do this, but I don't think he understood how that works in the criminal underworld," Miles said. "When you allow someone to take that much power and get out in front like that, pretty soon the people start paying loyalty to him and they quit paying to Lazcano."
The rise has so alarmed at least one gang chieftain that he has called for gangs, drug cartels, civic groups and even the government to form a united front to fight Trevino Morales, known as "Z-40," whom he blamed for most of Mexico's violence.
"Let's unite and form a common front against the Zetas, and particularly against Z-40, Miguel Angel Trevino Morales, because this person with his unbridled ambition has caused so much terror and confusion in our country," a man identified as Servando Gomez, leader of the Knights Templar cartel, said in an Internet video posted Tuesday.
In the two years since the Zetas split with their former allies in the Gulf cartel - a split in which Trevino reportedly played a central role - the gang has become one of Mexico's two main cartels, and is battling the rival Sinaloa cartel.
Now the Zetas' internal disputes have added to the violence of the conflict between gangs. Internal feuds spilled out into battles in the normally quiet north-central state of San Luis Potosi in mid-August, when police found a van stuffed with 14 executed bodies.

