The Cergy-Pontoise case (1979)
After Fontaine reappeared, the police investigation of the incident intensified and Groupe d'Etudes des Phénomènes Aérospatieux Non Indentifiés (GEPAN), France's main UFO investigation organization, joined the search for the truth. After interviewing the principals several times and looking for any collaborating evidence, GEPAN concluded that the incident was without any value in furthering knowledge of UFOs, a kind way of saying that they had concluded that it was a hoax.
Three years later, one of the three people named Jean-Pierre Prévot made a statement:
"I declare that the Cergy-Pontoise case is a fake story from the beginning to the end. I am responsible for everything. It's me who have all organized, all created. I can prove it. Franck Fontaine has lived the 8 days of his abduction in the appartment of a friend, at Pontoise; it's me who have lead him there, and it's me who have bring him back. How can one imagine that aliens come to abduct such a fool?"