In the heartland of Mexico's Sinaloa cartel, the old ways have changed and violence rages

Cellphone chats have become death sentences in the continuing, bloody factional war inside Mexico's Sinaloa drug cartel. Cartel gunmen stop youths on the street or in their cars and demand their phones. If they find a contact who’s a member of a rival faction, a chat with a wrong word or a photo with the wrong person, the phone owner is dead.