Yesterday Mexican authorities arrested Francisco Salgado, the fugitive former deputy police chief of the city of Iguala in the southern state of Guerrero, who is accused of having given the orders to detain the 43 Ayotzinapa students last September. Earlier this week former Iguala mayor Jose Luis Abarca, currently held by authorities, declared that he had nothing to do with the students' enforced disappearance. The former police chief of Iguala, Felipe Flores, remains at large. The case of the Ayotzinapa students, who have not been seen or heard from since, has become a national and international scandal, focusing attention on Mexico's human rights record. Clayton Conn reports from Mexico City. teleSUR