From Wikipedia:
The Devil’s Miner is a 2005 documentary film directed by independent film directors Kief Davidson and Richard Ladkani. The film follows a fourteen-year-old Bolivian boy named Basilio Vargas who along with his twelve-year-old brother Bernardino work in the mines near the city of Potosí. […]
The film concentrates on the concerns of local workers who have fear of what they call “Tio” or devil. In the film, an elder miner claims that over 8 million people have died in the unsafe mines. The workers believe this is because “Tio” controls the mine and that Christ has no power in the mine. The workers often give offerings such as coca leaves, alcohol, cigarettes and perform sacrifices, such as slaughtering a llama and applying its blood to the mine entrance to appease a makeshift statue of “Tio”.
