Although femicide is a recognised crime in Mexico, when a woman disappears, the authorities are notoriously slow to act. But there is someone who will take on their case.

Ignoring warning signs of misconduct, Baltimore Police praised — and promoted — a Gun Trace Task Force leader.

How an elite anti-narcotics task force became the most brazen drug thieves on the Texas border.

A rodeo rider squares off with a racist immigration official.

"He saw deputies in their serious hats coming through the restaurant from the kitchen, four white guys who looked like they meant business, serious, minds made up, and Nachee thought of a grandfather now from the other time, more than a hundred years ago, Nachitay, sitting in Mi Nidito with Victor’s grandfather from the same time, Victorio. Sometimes Nachee talked to Victor about those guys living the way they chose to. You hungry? Run off a mule, cut steaks and cook them over a fire. Before General Crook came along on his mule, the one Nachee’s grandfather from that other time was dying to eat. Bring them all here to sit with their rifles, Victorio, Cochise, Geronimo … those guys doing whatever they wanted. They never carried ID but every horse soldier in the Arizona Territory knew who they were."

On the difficulties of holding Oakland’s thin blue line accountable.

A profile of Rafael Pérez, an infamously corrupt LAPD officer and the inspiration behind the Vic Mackey character on The Shield.

In 2008, a Brooklyn cop grew gravely concerned about how the public was being served. So he began carrying a digital sound recorder, secretly recording his colleagues and superiors.