The Mexican government says experts have identified the remains of a second of the 43 students who went missing in the state of Guerrero almost a year ago. Mexican authorities have claimed the students were rounded up by local police and turned over to drug gang members, who killed them and burned their bodies at a garbage dump. A recent independent report rejected Mexico’s version of events and pointed to a role by federal police and the military in the students’ disappearance. On Wednesday, authorities said testing by experts in Austria determined a bone fragment from a site near the dump belonged to missing student Jhosivani Guerrero de la Cruz.