Randolph Severn “Trey” Parker III (born October 19, 1969) is an American animator, director, producer, screenwriter, actor, and composer. He is known for co-creating South Park (1997–) along with his creative partner Matt Stone, as well as co-writing and co-directing the Tony Award-winning musical The Book of Mormon (2011). Parker was interested in film and music as a child and at high school and attended the University of Colorado, Boulder, where he met Stone. The two collaborated on various short films, and starred in a feature-length musical, titled Cannibal! The Musical (1993) (Wikipedia).
The film is the latest in a long line of documentaries dealing with the street children of Brazil.