On 5 January 2007, it became known that King Albert II had signed a royal decree, making it possible for Laurent to be called up as a witness in the corruption trial which was to start 8 January. One of the defendants immediately used this to subpoena the prince. During the evening of 8 January, Prince Laurent was interrogated by federal police, appearing in court the following day where he testified at the trial that he had no reason to believe the funding of his renovations could be illegal.