Protógenes Pinheiro Queiroz (born May 20, 1959) is a Brazilian former Federal Police officer, who has led investigations in some of the country's most high-profile corruption cases.

[6] For nearly four years (2004–2008), Queiroz led Operation Satiagraha, a Brazilian federal police investigation into misuse of public funds, corruption and money laundering.

[7] In an interview the Procurator of the Republic, Rodrigo de Grandis, stated that the purpose of Satiagraha was to investigate two distinct criminal operations, one of which was led by Dantas.

"[8] In mid July 2008, Queiroz was removed from Operation Satiagraha by Luiz Fernando Corrêa, the head of Federal Police, for breaking the chain of command by not informing his superiors of the involvement of secret service agents.

At the time that Queiroz left Operation Satiagraha, President Luiz Inácio Lula da Silva called unsuccessfully for Quieroz to be reinstated to the case.