One cartel king behind bars is reason to celebrate. But the outlook is complicated.
Joaquín Guzmán, head of the Sinaloa drug cartel, was arrested this weekend. His capture could unleash infighting within the cartel and turf wars with other groups.
Authorities in Mexico found evidence of a budding alliance between the Knights Templar and Beltran Leyva drug cartels. Some say it's a sign that vigilante groups in Michoacán are 'working.'