Mexican authorities have arrested the former governor of the southern state Guerrero for his alleged involvement in the disappearance of 43 students in 2014, a case that has become a symbol for impunity and state involvement in cartel violence. Federal prosecutors said Thursday that they arrested Ángel Aguirre, Guerrero's former governor, on accusations of “concealing evidence to determine the whereabouts of the students" of the Ayotzinapa Rural Teachers’ College. Aguirre governed Guerrero from 2011 until he resigned in October 2014, one month after the students disappeared. According to Mexican authorities, a cartel in Guerrero state's city of Iguala attacked the students in collusion with security forces as well as local, state and federal authorities, including the military. Clemente Rodríguez, the father of one of the students, recalled that from the beginning families asked for Aguirre to be investigated.