Answer
The Iguala mass kidnapping, a dark event in 2014, drew significant criticism for his handling of the situation during his tenure. The incident involved the disappearance and presumed massacre of 43 students from the Ayotzinapa Rural Teachers' College in Iguala, Guerrero, Mexico. The government's response to the crisis, including accusations of collusion, cover-ups, and inadequate investigations, led to widespread condemnation and protests.