(FILES) This file photo taken on April 16, 2011 shows Brazilian Finance Minister Guido Mantega preparing to pose for the International Monetary and Financial Committee (IMFC) family phoo at the IMF/World Bank Spring meetings in Washington on April 16, 2011. 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 / NICHOLAS KAMMNICHOLAS KAMM/AFP/Getty Images