The woman and her four children whose bodies were found on Thursday buried in the garden of his home in Nantes (western France) were victims of "a methodical execution," according to justice, still looking for the father.
"The autopsy of the five bodies, which is now completed, has shown that we are facing a methodical execution," said Friday night the prosecutor in Nantes, Xavier Ronsin.
"They were killed with a gun as they slept," said the prosecutor.
Each victim received at least two shots, one in the head and chest, according to the same source.
French police still looking intensely at the south, where they found his car, the man claiming to be secret agent who has been missing since early April after the discovery in a house in Nantes the body of his wife and four children.
Ligonnès Xavier Dupont, 50 years old, a descendant of French nobility, is wanted by the police to investigate what happened to their four children aged 13 to 21 years and his wife of 49 years.
For the moment, justice is not accused of the killing, "but his testimony was essential to confronting the working hypothesis of the researchers with his statement," said Ronsin.
On Friday, one of the vehicles in the family was discovered in the parking lot of a hotel in Roquebrune sur Agens, in the department of Var (southeast France), on the other side of the country, where the family had lived before moving to Nantes.
The investigations were directed to that area after finding a cash withdrawal there on April 14, said a source close to the investigation.
"Everything is possible" because the situation is still "confused", said another source close to the investigation.
According Ronsin the night of April 12 the wanted man had dinner alone and slept in a hostel in Pontet, Vaucluse department (southeast). April 14 withdrew 30 euros at an ATM in Roquebrune sur Agens.
"On April 15, after spending the night in a Formule 1 hotel (a chain of budget hotels), Xavier Dupont Ligonnès" left only his room and left his vehicle in the vicinity without touching it since, "said prosecutor .
A neighbor of the family, Fabrice, said 15 days ago saw Xavier de Ligonnès wearing shorts and shoes nautical placing "huge bags in the car." He explained that his wife, , mother of four children, was last seen on Sunday 4 April.
Since that time the family was no longer around to see.
Far from believing in a fit of madness, the research seems to lean toward a carefully prepared scenario: the lease was terminated housing, friends and the direction of the school they were younger were warned by letter that the family moved abroad.
One of the first things that caught the attention of the police were explanations that the parent, who claimed to be a secret agent, would have given his surroundings: the career move to Australia or the United States under a "witness program protected. "
Researchers are also conducting a study of personality of the father to try to determine some elements that are still unclear.
According to the prosecutor, Xavier Dupont de Ligonnès was often absent from home on business. According to the judicial police, had been manager of a small business, other reports say that working in tourism or hospitality.