Guarda Streamingcommunity. Borders have defined Sansón’s life. There’s the physical and psychological border between Mexico and the US. And now, looking at a life behind bars, there’s the one that separates him from his loved ones. Since it is forbidden to film inside the jail, Reyes recreates Sansón’s life – with the help of his family – through letters and by casting an untrained actor to play his friend. The resulting film is a reflection on migration, the notion of family, what it means to see one’s life on film, and the harshness and injustice of the US prison system.