Before dawn, an elementary school principal in the capital of Mexico’s Sinaloa state checks various chats on his phone for word of shootouts or other incidents. If there’s danger, he sends a message ...

It’s Mexico’s Sinaloa cartel that's the biggest supplier of cocaine ... With all that security and firepower it’s a safe place in a dangerous city - unless a rival cartel pops by for a chat. The end ...

Deputy Michael Meiser, assigned to a specialized sheriff's department unit that monitored gang activity inside the jail ...