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.

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 ...

Several cartel operatives said that for the first time in years, they genuinely feared arrest or death at the hands of the authorities. Investigators collecting evidence last month at a crime ...