(FILES) This file photo taken on April 29, 2014 shows Brazilian Minister of Economy Guido Mantega during the seminar New Brazil at the Lower House in Brasilia on April 29, 2014. 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