The former head of the Financial Crimes Squad (SDOE), Yiannis Diotis, was released on Wednesday after being questioned by magistrates investigating the Lagarde list.
Diotis is accused of failing to investigate whether any of some 2,000 Greeks named on the list of depositors with accounts at the Geneva branch of HSBC were guilty of tax evasion.
He has been charged with breach of trust and removing an official document.
Yiannis Kapeleris, Diotis’s predecessor, was also released following questioning on Tuesday.
Giorgos Papaconstantinou, who was finance minister between October 2009 and June 2011, is due to face a special court in connection to his handling of the Lagarde list. He faces charges of breach of trust, doctoring an official document and dereliction of duty.