Prosecutors are investigating how a man certified as dead got elected mayor of a village in southern Mexico. Authorities say relatives of Lenin Carballido used a death certificate showing that he died of a diabetic coma in 2010 to convince police to drop an arrest warrant against him for allegedly participating in a 2004 gang rape. A living Carballido later ran in, and narrowly won, Sunday’s election in San Agustin Amatengo in Oaxaca state. In his campaign, he posted photos of himself all around the village of 1,400 residents, with slogans like “Now is the Time” and “United for Development.”...