Brazil police officer, symbol of corruption crackdown, arrested

Jose Dirceu (front R), former Brazilian President Luiz Inacio Lula da Silva's chief of staff, is escorted by federal police officer Newton Ishii as he leaves the Federal Police headquarters to give his testimony in a session of the Parliamentary Committee of Inquiry in Curitiba, Brazil, August 31, 2015.

BRAZIL: He is a symbol of Brazil's biggest corruption investigation - a ballyhooed battle against impunity for powerful politicians and businessmen.

But on Wednesday, federal police agent Newton Ishii sat in the same jail where he had been photographed and shown on TV escorting countless high-profile politicians and executives linked to a kickback scandal at state-run oil company Petrobras (PETR4.SA).