Ricardo Illescas Ramírez wanted a drink. It was August 2013, and the 25-year-old clothing salesman was in Potrero Nuevo, on Mexico’s eastern Gulf coast, in Veracruz state. He had arrived earlier that afternoon to meet with buyers, and when he finished for the day, Ramírez plopped down at a rickety bar near the center of town. Shortly after he walked in, witnesses say, a group of men in police uniforms burst through the door, dragged Ramírez and several others outside, shoved them into patrol cars and drove off. Witnesses reported similar incidents earlier that day at a nearby park and truck stop. In total, 20 people vanished in Potrero Nuevo that day. None have been seen or heard from since.