Grégory Villemin, Marion Wagon, Cécile Vallin… Their names have unfortunately become famous and symbolize failures to solve crimes sometimes dating back several decades.
Like hundreds of others, less publicized and sometimes closed, these cases are considered cold cases.
Recent advances in the Estelle Mouzin case, who disappeared in 2003 in Guermantes, or the arrest in 2020 of a man suspected of having killed Chantal de Chillou nineteen years earlier in the Drôme, demonstrate that scientific advances or new investigative techniques can sometimes help solve these previously thought unsolvable mysteries.
Cold cases: the report that wants to change everything
In a report made in recent days and revealed this Saturday by Le Parisien, a working group made up of police officers, gendarmes and magistrates especially recommends reviewing a lot of points in the management of cold cases by justice.
In order, one day perhaps, to resolve these cases which have become emblematic.
The Gregory affair
It is without a doubt the most famous cold case in France.
On October 16, 1984, Grégory Villemin, aged 4, was discovered dead hand and foot in the Vologne region.
The case shocked France, but thirty-six years after the death of the little boy, the investigation has still not made it possible to refer a suspect to court.
Dotted with many dramas and twists in nearly forty years, this investigation had made a major breakthrough in the summer of 2017 with the indictments of the Jacob spouses - Grégory's great-uncle and great-aunt - and Murielle Bolle.
The thesis adopted was then that of a “collective family crime” motivated by jealousy towards the social success of Grégory's parents.
The case was finally put on hold after appeals filed by the defense.
The parents of little Grégory rely on DNA to finally know the truth
The investigation has since resumed.
New auditions have taken place, and stylometric expertise is eagerly awaited.
It aims to unmask the raven (s) who threatened Grégory's parents and claimed responsibility for the assassination.
What finally to judge the assassins of little Grégory?
The Lucas Tronche enigma
It is a teenager with blond hair who obsesses the investigators of the judicial police.
"It's a totally enigmatic affair," said a great cop.
A total mystery.
»On March 18, 2015, Lucas Tronche, a young 15-year-old boy, a good student and good about himself, disappeared without leaving a trace.
He had to join his brother at a bus stop in Bagnols-sur-Cèze (Gard) to go to a swimming lesson.
Since that date, Lucas's parents have never given up and multiplied the initiatives to obtain information on the boy's disappearance: television spots, poster campaign ...
In December 2016, the Montpellier judicial police issued a call for witnesses to find a man seen a few hundred meters from the house of Lucas's parents.
Aged about 40, thin, bald, with hollow cheeks and driving around in a Citroën AX, he has never been identified.
In 2019, “checks” took place at the young man's home, but did not provide any decisive elements.
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However, a number of investigators remain mobilized on this file.
“I trust them, but unfortunately there is nothing new.
It's still the great mystery, ”the young boy's mother told Midi Libre last week, on the occasion of the sixth anniversary of Lucas's disappearance.
Mysterious serial disappearances
"Missing from the A6", "missing from Isère", "missing from the A26".
Justice, for lack of methodology, often assures specialist lawyer Corinne Herrmann, has never been able to establish formal links between all the murders and disappearances listed under these names.
However, they remain disturbing series that sometimes span several years, but focus on a very small geographical area, leaving the fear of one or more serial killers.
Between 1980 and 1996, a dozen children disappeared or were found dead in Isère.
Ludovic Janvier, who disappeared at age 6 in 1983, and Chanez Bendouiou, aged 10 when she evaporated on July 8, 1987, are the best known and their files still lie dormant in court archives.
Of the twelve kidnappings or murders of children committed in this area, only three have been solved.
A little to the north, it is in the "triangle of fear", an area of less than 200 km around the A6 motorway, that several young women disappeared or were killed between 1984 and 2005. If some murders, like that of Christelle Blétry, have been elucidated, many of them remain a mystery.
Eleven families are now gathered within the Christelle association to try to find out the truth about this emblematic issue.
Disappeared from the A26: a beginning of truth in the death of Christel
The "disappeared from the A6", in Picardy, prove that you should never give up.
Thirty-four years after the murder of Christel Oudin, a man was indicted in June 2019. The families of three other women - Sophie Borca, Marie-Thérèse Borde and Ghislaine Charlier - found dead at the same time and in the same sector still hope for a similar outcome.
The Chevaline slaughter
Cold cases are not just the disappearance of children or young women.
If the Dallest report took care to keep the settling of scores between thugs out of its field of action, certain resounding criminal investigations are nevertheless considered to be cold cases.
This is particularly the case with the Chevaline massacre, which remains one of the biggest headaches for French investigators.
On September 5, 2012, on the perpetrators of Lake Annecy, four corpses were discovered, shot dead.
The victims are three members of the Al-Hilli family, Brits from Iraq on vacation in France, and a 45-year-old cyclist from the region, Sylvain Mollier.
Almost ten years after this quadruple murder, the police have no serious leads.
Aged 4 and 7 years old at the time of the facts, the two girls of the Al-Hilli family had to be heard again in recent months in order to restart the investigation.