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Federal police arrest the former head of Petrobras.
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Costa signs a plea bargain deal with prosecutors, agreeing to explain the corruption scheme and name beneficiaries in exchange for a lighter sentence.
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Millions of dollars were allegedly skimmed off inflated contracts for the Abreu e Lima refinery being built near Recife in Brazil’s northeast.
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Prosecutors formally charge 36 people, 22 of them from engineering firms OAS , Camargo Correa, UTC Engenharia, Galvao Engenharia, Mendes Junior and Engevix. Prosecutor Deltan Dallagnol declares war on corruption in Brazil in a nationally televised press conference.
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Brazil's Supreme Court says it will investigate the speakers of both houses of Congress, 32 other politicians in connection with the Petrobras scandal. 12 senators and 22 congressmen from 5 parties are under investigation.
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In video testimony, a key witness who brokered lucrative Petrobras contracts for suppliers testifiyed that combative speaker of the House demanded and received $5 million in overdue bribes.
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Federal prosecutors opened a formal inquiry into whether former President Luiz Inácio Lula da Silva improperly used his connections overseas.
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Hundreds of thousands of protesters march to demand President Rousseff's resignation, blaming her and the leftist Workers' Party over alleged large-scale corruption and looming recession.
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Three executives of Brazil's Camargo Correa group are convicted of money laundering, corruption and other charges. Two will serve a year of house arrest with electronic monitoring. The third could face nine years and six months in prison.
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It was discovered that energy companies had bribed politicians to vote for industry-friendly laws.
