The son of a Mexican drug cartel boss was sentenced to life in a U.S. prison for his leadership role in one of the country's largest and most violent narcotics trafficking organizations.

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

Gun rights groups say Mexico wants to bankrupt America's firearms industry. Mexico blames US companies for arming cartels.

It isn’t the only new routine in Culiacan, a city of 1 million residents that for the past six months has been the battlefield for the two main factions of the Sinaloa drug cartel. The violence ...

Mexico was also releasing into U.S. custody Miguel Ángel Treviño Morales, an infamously brutal former leader of the Zetas cartel who was captured in Mexico in 2013, the people said. Mr. Treviño ...