Doubts exist about the identity of the man arrested at Glasgow Airport, Scotland, who had been presented as possibly being Xavier Dupont de Ligonnès.

The identity of the man presented as being Xavier Dupont Ligonnès because of fingerprints corresponding, left a "doubt" Saturday, according to a source close to the investigation. After exchanges between the French and Scottish police, this man was arrested Friday night at Glasgow airport from Paris. Xavier Dupont de Ligonnès has disappeared since the murder in 2011 of his wife and four children in Nantes.

"Identification checks" in progress

French investigators were expected on the spot late morning, according to this source close to the investigation. "The investigators are moving to Scotland to make checks on the identification, the investigating judge expects the result of this investigation," said the side of Nantes prosecutor, Pierre Senes. "Identification checks" are ongoing, he added.

The Scottish police just announced Friday night the arrest of a man at Glasgow airport at the request of the French authorities and said that "the investigation continues to confirm his identity." BFM TV also said Saturday morning that the suspect's fingerprints only correspond "very partially" to those of Xavier Dupont de Ligonnès. Of the 13 points of recognition needed, only five would correspond.

The arrested man traveled with a passport under the name of Guy Joao. The investigators also carried out a search in the home located at the address entered on this passport, in Yvelines. But a testimony came to stir trouble on Saturday morning. Jacques, a neighbor of the raided house, who says he is close to Guy Joao, expressed his doubt to the microphone of Europe 1: "Even with plastic surgery, it is not possible" that it is Xavier Dupont de Ligonnès has he said.