FILE - In this May 16, 2012 file photo, Brazil's former President Luiz Inacio Lula da Silva attends the installation of the Truth Commission at Planalto presidential palace in Brasilia,

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FILE - In this May 16, 2012 file photo, Brazil's former President Luiz Inacio Lula da Silva attends the installation of the Truth Commission at Planalto presidential palace in Brasilia, Brazil. Pressure is growing for prosecutors to open an investigation into popular former President Luiz Inacio Lula da Silva amid new accusations he knew of a cash-for-votes in Congress scheme that has seen 25 people, including his one-time chief of staff, convicted. (AP Photo/Eraldo Peres, File) less