The ongoing decline of the Gulf Cartel and the Zetas has left northeastern Mexico without a single dominant criminal force. But the crime groups' longstanding rivalry has continued to see blood spilled in the key trafficking region.
No criminal organization illustrates the life-and-death struggle that has embroiled Mexico over the past decade better than the Zetas. Three new books offer a look back at the group's violent legacy.
At least 13 people have died in a prison mutiny in north Mexico that some witnesses claim was a backlash against an attempted takeover of the prison by the Zetas, highlighting the criminal control and corruption that are pervasive in the penal system.
A former leader of the Gulf Cartel has pleaded guilty to drug trafficking charges in the United States, a reminder that the once-powerful crime group has all but disappeared from Mexico's criminal landscape.