(FILES) This file photo taken on October 27, 2015 shows former Brazilian Economy Minister Guido Mantega during the public hearing of the Parliamentary Commission of Inquiry investigating suspicious loans made by the National Economic and Social Development Bank (BNDES) at the Congress in Brasilia on October 27, 2015. Brazilian police Thursday arrested Guido Mantega, a former finance minister under presidents Lula da Silva and Dilma Rousseff, as part of the investigation into the vast Petrobras corruption scheme, media reported. / AFP PHOTO / EVARISTO SAEVARISTO SA/AFP/Getty Images