"She was living with her parents before that, and no-one could have foreseen such an abrupt change in her behaviour, " Mr Farias told Clarin newspaper.
The mother's lawyer, Fabian Farias, said Edith was "not in full control of her mental faculties" and said her physical and psychological wellbeing were in danger.
From his perch in a box seat, Brazilian soccer great Romario de Souza Farias summed up the event: "Carnival means the union of all the different people, and all the different races, " he said.