The family of the first victim identified among 43 missing Mexican students lamented the dashed dreams of the aspiring teacher Sunday, calling for justice in the case that has shocked the country.
Forensic experts will conduct new tests to see if the remains match those of the other youths missing since September, Attorney General Jesus Murillo Karam said, as evidence mounts they were slaughtered by a police-backed gang.
The remains identified were of Alexander Mora, from a charred bone shard found in a landfill.
Authorities had sent the badly burned remains to an Austrian medical university last month after the Guerreros Unidos cartel confessed to killing the students and incinerating their bodies in the southern state of Guerrero.
If all 43 students are confirmed dead, it would rank among the worst mass murders in a drug war that has killed more than 80,000 people and left 22,000 others missing since 2006 in Mexico.
The case has drawn international condemnation, highlighted Mexico's struggle with corruption and undermined President Enrique Pena Nieto's assurances that his security policy was bearing fruit.