Salles, 52, started out making documentaries, and his fiction films still possess a strong sense of realism.
Mr Salles' findings were submitted in a report that had been commissioned by appeal judges in Rennes last November.
BBC: France probes US submarine link to fishing boat sinking
Submarine expert Dominiques Salles said in May the sinking could have been caused by a US nuclear attack submarine.
BBC: France probes US submarine link to fishing boat sinking
Filming on the road, which injects an element of uncertainty, is another method Salles uses to foster natural improvisation.
About half of the film, which premiered at the Cannes Film Festival this year, was improvised, according to Salles.
To achieve that authenticity, Salles often casts non-actors and relies heavily on improvisation.
The bank is still controlled by its founders, the Moreira Salles family.
Salles is currently working on an adaptation of "On the Road" with Francis Ford Coppola and aims to start filming in the spring.
Salles has also expressed an interest in returning to Brazil after shooting "On the Road, " in order to continue his exploration of the Brazilian psyche.
"Brazil is still a country in the making, " Salles told CNN.
Salles is approaching "On the Road" in a similarly thorough manner.
While the likes of Salles and Meirelles are often courted by Hollywood production companies and invited to direct studio movies, both prefer to work on independent films.
According to Salles, film-makers from the region have been able to create such successful and imaginative movies because of the raw material provided by the Latin American experience.
With Brazilian society's countless facets and stark contrasts serving as their inspiration, it would seem the film festival circuit hasn't seen the last of Salles, Meirelles and co.
Salles is at the forefront of a new wave of Latin American cinema and has played a central role cultivating a sense of unity among the region's filmmakers.
The son of a diplomat, Salles grew up moving from country to country and developed an interest in filmmaking because he wanted to explore his roots and better understand his homeland.
After all, it is these neglected films that remind us of how we lived in a specific period of time, according to Salles, and by saving them, history is being preserved.
That experience him better understand the roots of the Beat movement and the inspiration behind the Kerouac's book, Salles said, who is committed to staying faithful to the essence of the book.
Ginsberg, one of the most awarded of American poets, has popped up several times recently in films like Howl, where he was played by James Franco, and Walter Salles's movie adaptation of the Kerouac novel, On the Road.
The other saints to be named include Frenchman Jacques Berthieu, a Jesuit who was executed in Madagascar in the 19th century, and another Catholic martyr in the Philippines, Pedro Calungsod, as well as Giovanni Battista Piamarta, Maria Carmen Salles y Barangueras and Anna Schaffer.
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