Story highlights Julio César Mondragón Fontes was found dead the morning after 43 students disappeared

He had 64 fractures in 40 bones

(CNN) Authorities in Mexico say that a classmate of 43 college students who disappeared died after being tortured.

Julio César Mondragón Fontes, a student at a teachers' college in the small town of Ayotzinapa, went with a group of about 100 of his fellow pupils to the city of Iguala to raise money on September 26, 2014. It's still not clear exactly what happened -- Mexican authorities initially said the students were attacked and abducted by corrupt police officers, then possibly handed over to a dangerous criminal gang -- but 43 students disappeared. Reports that their bodies were burned in a nearby landfill have since been debunked ; their whereabouts remain unknown nearly two years later.

The case sparked an international outcry, putting the country's endemic corruption and failing battle against violent crime in the global spotlight.

According to the report published Monday by Mexico's National Human Rights Commission -- a federally funded but impartial investigative agency -- Mondragón's body was found the next day, mutilated. He is not included in the tally of missing students.

Photos: Photos: Missing Mexican students Photos: Photos: Missing Mexican students Missing Mexican students – Forty-three students remain missing after armed men ambushed buses carrying students in southern Mexico on on September 26 .The Mexican state of Guerrero posted images and offered a reward of 1 million pesos ($74,000) for information leading to the missing students. Images of three missing students were not available. Hide Caption 1 of 41 Photos: Photos: Missing Mexican students Hide Caption 2 of 41 Photos: Photos: Missing Mexican students Hide Caption 3 of 41 Photos: Photos: Missing Mexican students Hide Caption 4 of 41 Photos: Photos: Missing Mexican students Hide Caption 5 of 41 Photos: Photos: Missing Mexican students Hide Caption 6 of 41 Photos: Photos: Missing Mexican students Hide Caption 7 of 41 Photos: Photos: Missing Mexican students Hide Caption 8 of 41 Photos: Photos: Missing Mexican students Hide Caption 9 of 41 Photos: Photos: Missing Mexican students Hide Caption 10 of 41 Photos: Photos: Missing Mexican students Hide Caption 11 of 41 Photos: Photos: Missing Mexican students Hide Caption 12 of 41 Photos: Photos: Missing Mexican students Hide Caption 13 of 41 Photos: Photos: Missing Mexican students Hide Caption 14 of 41 Photos: Photos: Missing Mexican students Hide Caption 15 of 41 Photos: Photos: Missing Mexican students Hide Caption 16 of 41 Photos: Photos: Missing Mexican students Hide Caption 17 of 41 Photos: Photos: Missing Mexican students Hide Caption 18 of 41 Photos: Photos: Missing Mexican students Hide Caption 19 of 41 Photos: Photos: Missing Mexican students Hide Caption 20 of 41 Photos: Photos: Missing Mexican students Hide Caption 21 of 41 Photos: Photos: Missing Mexican students Hide Caption 22 of 41 Photos: Photos: Missing Mexican students Hide Caption 23 of 41 Photos: Photos: Missing Mexican students Hide Caption 24 of 41 Photos: Photos: Missing Mexican students Hide Caption 25 of 41 Photos: Photos: Missing Mexican students Hide Caption 26 of 41 Photos: Photos: Missing Mexican students Hide Caption 27 of 41 Photos: Photos: Missing Mexican students Hide Caption 28 of 41 Photos: Photos: Missing Mexican students Hide Caption 29 of 41 Photos: Photos: Missing Mexican students Hide Caption 30 of 41 Photos: Photos: Missing Mexican students Hide Caption 31 of 41 Photos: Photos: Missing Mexican students Hide Caption 32 of 41 Photos: Photos: Missing Mexican students Hide Caption 33 of 41 Photos: Photos: Missing Mexican students Hide Caption 34 of 41 Photos: Photos: Missing Mexican students Hide Caption 35 of 41 Photos: Photos: Missing Mexican students Hide Caption 36 of 41 Photos: Photos: Missing Mexican students Hide Caption 37 of 41 Photos: Photos: Missing Mexican students Hide Caption 38 of 41 Photos: Photos: Missing Mexican students Hide Caption 39 of 41 Photos: Photos: Missing Mexican students Hide Caption 40 of 41 Photos: Photos: Missing Mexican students Hide Caption 41 of 41

In total, there were 64 fractures in 40 bones all over his body, the report said. Of the 14 bones in his face, 13 were fractured. His body showed signs that he tried to defend himself.

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