[4] He took part in numerous espionage trials in which he sought help from writer Gilles Perrault in aiding Red Orchestra leader Leopold Trepper in his escape from Poland, who was being held against his will by Mieczysław Moczar.
[4] Larivière was the lawyer for Victor Rochenoir in the Affaire de la Garantie foncière [fr][5] and subsequently entered the field of business criminal law, focusing on construction problems.
In 1985, he was commissioned by the Government of France to defend French citizens in the case of the Opération Satanique.
[8] Since 2010, he became involved with French collaboration with the U.S. Securities and Exchange Commission and the United States Department of Justice.
He was a member of the Club des juristes [fr], a think tank led by Bernard Cazeneuve.