Before his relation with Workers' party, Delcidio nominated a new director to Fernando Henrique Cardoso, Nestor Cervero.

A Supreme Court judge, Teori Zavascki, said he authorised the arrest after seeing evidence that Amaral had planned the flight of Petrobras's former international director, Nestor Cerveró [pt], in return for his silence.

Ceveró was convicted of money laundering and sentenced to five years in prison.

[4] On 16 March 2016 Amaral signed a plea bargain alleging involvement of other politicians in corruption scandals in Brazil.

On 10 May 2016 the Senate approved by 74 votes in favor, the removal of Mr. Amaral from office for breaching parliamentary decorum.