AP Photo

The full story of the massacre in Tamaulipas, in northeast Mexico, awaits telling by its one survivor. The early news accounts are horrifying: 72 people, said to be migrants from Central and South America on their way to the United States, are waylaid and imprisoned by drug smugglers on a ranch 100 miles south of Texas. They refuse to pay extortion fees and are executed. The survivor, shot in the neck, hears their screams for mercy as he flees. After a gun battle with the authorities, the killers escape in S.U.V.’s. The dead, 58 men and 14 women, are found piled in a room, discarded contraband.