I think Americans should boycott brazilian products, cancel tourism and protest at their embassy until the Brazilian government releases this boy to his father and tosses the kidnapper in jail.
The step father's grandfather, Evandro, who died in 2003, was a founder of the Brazilian socialit party, a celebrity lawyer and friend of the current president, Lula.
Looks like this family is above the law.
I think the only way Mr. Goldman will get his son back is if there is tremendous public pressure in Brazil. One way to do that is for the US to stop issuing vistas to Brazilians until the boy is released. Upper class Brazilians love to visit the United States and a travel ban might upset them enough to do the trick.