The decision was made by the investigating judge Maria Antónia Andrade, who confirmed the prosecution's indictment for the four defendants in the 'Operation Knight' case: Diogo Gaspar, José Dias, Paulo Duarte and Vítor Santos.

In June 2016, the then director of the Presidency Museum was arrested on suspicion of influence peddling, document forgery, embezzlement, economic participation in business and abuse of power.

The Public Prosecutor's Office claims to have evidence that Diogo Gaspar misused "state resources for private purposes" and that he appropriated public property and harmed public property interests.

The 'Operation Knight' investigation began in April 2015.