Quentin Sommerville meets Mexican cartel foot-soldiers smuggling deadly fentanyl into the United States, and sees first hand ...

Brothers Miguel and Omar Trevino Morales — aliases "Z-40" and "Z-42" — led one of Mexico's most powerful and feared organized ...

The BBC's Will Grant visits the site believed to have been used by drug cartels to dispose of victims' remains.

A group of citizens, helped by an anonymous tip, found dozens of shoes, heaps of clothing and what appeared to be human bone ...

Former leaders of the Los Zetas cartel were arraigned in Washington, D.C., on charges including drug trafficking, firearm ...

Authorities are trying to figure out how many were killed at a Jalisco ranch that apparently was used as a cartel training ...

Cartels recruit more people than they lose and are deeply embedded in the U.S., former DEA Special Agent Brian Townsend warns ...

As the president tries to force Mexico to stop the flow of drugs, cartel members tell Quentin Sommerville they will not be ...

A civilian search group found a gruesome site near Guadalajara, sparking outrage as authorities had raided the area months ...

Despite recent cooperation like the extradition of 29 prisoners including high-profile names such as Rafael Caro Quintero, ...

Several cartel operatives said that for the first time in years, they genuinely feared arrest or death at the hands of the ...

In Mexico's Culiacan, a city of 1 million residents, an elementary school principal starts each day checking for shootouts ...