The Night Guard
El Vigilante (original)
Humberto works as a night watchman at a remote and desolate construction site. One night he becomes, unwittingly, the sole witness to a cover up. Afraid of being retaliated against lest he come forth, he decides to keep quiet. Gradually and without him being aware of it, Humberto ends up inflicting on his family the same violence from which he´s running away.
Starring Leonardo Alonso, Juan Carlos Vives, Ricardo Esquerra, Salomón Santiago, Izmir Gallardo, Iván Cortes, Ari Gallegos, Héctor Holten, Lilia Mendoza, Noé Hernández
It's a crime and drama movie, and has a rating of 6.8 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Argentina.