The Mexican police, military officers and others secretly colluded with a cartel that kidnapped 43 students, a case unsolved after nearly a decade. Wiretaps show just how much the authorities helped the cartel behind the mass abduction, and what led to it.The Mexican police, military officers and others secretly colluded with a cartel that kidnapped 43 students, a case unsolved after nearly a decade. Wiretaps show just how much the authorities helped the cartel behind the mass abduction, and what led to it.