Former president Nicolas Sarkozy's lawyer and close friend Thierry Herzog and senior judge Gilbert Azibert were questioned in police custody on Monday 30th June as part of an ongoing investigation into the alleged trading of confidential judicial information in return for political favours. In particular, Azibert is suspected of having passed on information about a part of the Bettencourt affair in the hope that he would be favoured in his application for a top judicial post in Monaco. A third man, an advocate general at France's top appeal court which was handling the Bettencourt affair, was also being questioned. As Mediapart's legal affairs correspondent Michel Deléan reports, the questioning in custody of such senior figures will send shock waves through the judicial establishment. On the evening of Tuesday July 1st, Herzog and Azibert appeared before the judges carrying out the probe and were placed under formal investigation.