Newly inaugurated Mexican President Andrés Manuel López Obrador is following up on a campaign promise to create a truth and justice commission to investigate the 2014 disappearance of 43 students from a teachers’ college in the town of Ayotzinapa in Guerrero. The students were attacked by local police as they headed to a protest and are presumed dead. International experts say the Mexican military and federal police also played a role in their disappearance.