Pixote: a Lei do Mais Fraco (] , lit. "Pixote (small child): The Law of the Weak") is a 1980 Brazilian drama film directed by Héctor Babenco. The screenplay was written by Babenco and Jorge Durán, based on the book "A Infância dos Mortos" ("The Childhood of the Dead Ones") by José Louzeiro.
Louzeiro and Barbenco directed a movie together. 
There is nothing saying that Louzeiro had a hand in directing this or any other movies, but nothing contradicts it. 