Federal agents say the violence is part of a war for control of the Gulf cartel.

On Mexico's east coast, the Gulf cartel has ruled for nearly as long.

But after failing to meet the Gulf Cartel's demands, he was replaced.

When the Gulf Cartel was sure that the highways were safe, they would move the drugs north to the border.

He had made more than $5 million dollars throughout his eleven-year career as leader of the Gulf Cartel.

These were actions that the Gulf Cartel allegedly disagreed with.

It was one of the first clear signs, the authorities said, that the Gulf Cartel would not surrender easily.

Court records say that Yarrington used $450,000 from the Gulf cartel to pay the 14th floor unit.

The Gulf Cartel, however, was suffering from an infighting by the time of his arrest.

It managed to take control of most of the territories owned by the Gulf cartel when they had essentially served as a single organization.