With Jean-Louis Bruguière, Ricard was in charge of the file of the 1996 Paris RER bombing on the Réseau Express Régional in Saint-Michel.
[10] From 2006 to 2008 Ricard was seconded to the Ministry of Armed Forces, where he led a team as head of the military criminal affairs division.
[2][11] Ricard advocated for the creation of a French national anti-terrorism prosecution along with Magistrate Jean-Louis Bruguière, Michel Debacq (former head of the specialized section of the Paris prosecutor's office), and Christian Vigouroux [fr] (former chief of staff of Christiane Taubira and Élisabeth Guigou).
[7] After the receipt of the opinion of France's Superior Council of the Judiciary (Conseil supérieur de la magistrature [fr]; CSM) at its meeting of 21 May 2019, the 62-year-old Ricard was appointed General Counsel at the Court of Cassation to exercise the function of anti-terrorism public prosecutor at the Tribunal de grande instance de Paris, heading a new National Terrorism Prosecution Office (Parquet national antiterroriste [fr]; PNAT), beginning on 25 June 2019.
[15] Shortly after the 2022 Russian invasion of Ukraine, Ricard opened three inquiries over possible war crimes in the Ukrainian towns of Mariupol, Hostomel and Chernihiv, all related to acts against French citizens in the country.