Federico Guevara Elizondo is a student at Colegio Americano del Noreste, a private bilingual school south of Monterrey, Nuevo Leon, Mexico.

He was a member of a closed Facebook group known as Legión Holk, which promotes violence and mass shootings among the members.

At the time of his death, he was being treated for depression. On his Facebook account, he would post about the Illuminati.

On January 18, 2017, a t approximately 8:00 a.m., Federico took a .22 caliber firearm and fired at close range at two of his classmates, one identified as Luis Fernando Ramirez González, and his teacher, Cecilia Solís.

He then reloaded the weapon using cartridges from a box, shooting himself in an act of suicide on the chin. Federico died in a hospital later.

Prior to the shooting, Federico was planning the incident with others in a secret Facebook group called Legión Holk. On the night before the shooting, he posted on his Facebook personal account that he would commit a shooting at his school.

He also posted on 4chan. Shortly after the shooting, Legion Holk celebrated the attack on Twitter.