The 45-year-old suspect in the killings of the two women on Thursday in and around Valence is being linked to the murder of another HR manager who was shot dead more than 500km away.
The sister of a mother of two children who was shot dead with her parents by a partner previously reported to the authorities for domestic violence has brought a court case against the French state for failing to prevent the killings in what her lawyer said was a 'textbook case' of 'neglect at every level'.
Imran Aliev, 44, who used the pseudonym Mansur Staryi and was a vocal opponent of Chechnya's strongman president Ramzan Kadyrov, was found dead with knife wounds to his throat in a hotel close to the central railway station in Lille, north-east France.
Ian Bailey, 62, an expatriate British former journalist living in Ireland who was found guilty in absentia by a Paris court for the murder in 1996 in County Cork of French TV producer Sophie Toscan du Plantier, a crime he denies, has been ordered to be extradited to France by Dublin's High Court.
Willy Bardon, 45, who was on Friday found guilty of taking part in the abduction and rape of a young woman found murdered in northern France in 2002, was reported to be 'emerging from a coma' this weekend after he swallowed a highly toxic pesticide when the court's verdict was announced.
A Paris court will next week try in absentia Ian Bailey, 62, a British expatriate living in west Cork, Ireland, who is accused of the 1996 murder there of French filmmaker Sophie Toscan du Plantier which Bailey denies committing but says he will 'almost certainly' be convicted of.
A 102-year-old woman is the chief suspect in the killing of a 92-year-old woman found to have been beaten and strangled in her bed in the care home for the elderly where both of them lived, in a village about 70 kilomertres east of Paris.
Two killings in Paris, one year apart, have inflamed the bitter French debate over antisemitism, race and religion.
In a dramatic turnaround at his trial in Aix-en-Provence in southern France, Wojciech Janowski, Poland's former honorary consul to Monaco and son-in-law of billionaire heiress Hélène Pastor, 77, has confessed to organising her murder by hitmen in 2014 but denies ordering the killing of her chauffeur.
A once-closed investigation into the unsolved suspectedt murder of a four-year-old girl, whose unidentified body which bore marks of brutal injuries was found in a ditch beside a motorway in central France in 1987, appeared close to finally being solved after DNA identification taken from her brother arrested in 2016 for an unrelated violent crime led police to her parents, who were arrested this week.
French nationals Sabrina Kouider, 35, and her partner Ouissem Medouni, are accused of murdering their 21-year-old nanny, also from France, and trying to dispose of her body by setting fire to it in their garden in Wimbledon, south-west London.
The husband of a 29-year-old bank worker whose partially-burnt body was found last October in countryside near their home in Gray, north-east France, has been detained for questioning by police who until now have found no other suspects for her murder by strangulation.
French police have begun reopening unsolved cases of murders and disappearances in and around the French Alps after the arrest of 34-year-old former army doghandler over the disappearance in the region of a girl aged 9 has now led to the discovery of evidence suggesting his involvment in the nearby murder of a soldier.
March of some 10,000 people took place in north-eastern town after burnt body of Alexia Daval, 29, who disappeared while jogging, was found.