Brazilian Senator Flavio Bolsonaro, Lula's top rival in next month's election, is under investigation for alleged corruption linked to financing a biopic about his father, former President Jair Bolsonaro.
The investigation came to light as Brazil's Supreme Court unseals files related to the Banco Master corruption scandal.
Just weeks before the vote, Brazilian presidential hopeful Flavio Bolsonaro's campaign is being rocked by revelations he is under investigation for alleged corruption and money laundering.
