Eugenio Sebastián Nain Caniumil (13 April 1996 – 30 October 2020) was a Chilean policeman and secondary corporal who was shot to death by an unidentified armed group in the Padre Las Casas commune.

[7] On the morning of Friday, October 30, 2020, Nain went along with other members of the Carabineros to Ruta 5 Sur, near the Cantera de Metrenco sector in Temuco, where the highway had been blocked due to a protest with barricades.

I ask my compatriots, I ask YOU, to help us find these miserable people, these wretches and place them at the disposal of Justice.On the part of the government, the act was condemned, and President Sebastián Piñera made a call to "depose, exile and end the violence."

Víctor Pérez Varela, then-Minister of the Interior, declared that the murder was "a painful event for Chile and La Araucanía," and visited the area the same day.

Benjamín Olave Huichaleo, Nain's uncle and fellow policeman, harshly criticized the conditions in which they worked in the field, and Temuco Hospital he called for General Rozas to "put on his pants".