My cell phone rang. At the other end, from some unknown place, the voice of a man with authority gave accurate directions and clear instructions. Commandant Rodrigo Doble Cero, the founder of the bloodthirsty paramilitary group Bloque Metro, had agreed to my request for an interview. I scribbled down the directions. “Sunday. 8:30 am. San Roque. Drive towards Puerto Berrio. Pass Barbosa. Make a right after Cisneros. We’ll meet in the main square in front of the church.” It was the call I had been hoping for.